The Collaborative International Dictionary of English v.0.48:

Ordinary \Or"di*na*ry\, n.; pl. Ordinaries (-r[i^]z).
   1. (Law)
      (a) (Roman Law) An officer who has original jurisdiction
          in his own right, and not by deputation.
      (b) (Eng. Law) One who has immediate jurisdiction in
          matters ecclesiastical; an ecclesiastical judge; also,
          a deputy of the bishop, or a clergyman appointed to
          perform divine service for condemned criminals and
          assist in preparing them for death.
      (c) (Am. Law) A judicial officer, having generally the
          powers of a judge of probate or a surrogate.
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   2. The mass; the common run. [Obs.]
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            I see no more in you than in the ordinary
            Of nature's salework.                 --Shak.
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   3. That which is so common, or continued, as to be considered
      a settled establishment or institution. [R.]
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            Spain had no other wars save those which were grown
            into an ordinary.                     --Bacon.
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   4. Anything which is in ordinary or common use.
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            Water buckets, wagons, cart wheels, plow socks, and
            other ordinaries.                     --Sir W.
                                                  Scott.
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   5. A dining room or eating house where a meal is prepared for
      all comers, at a fixed price for the meal, in distinction
      from one where each dish is separately charged; a table
      d'h[^o]te; hence, also, the meal furnished at such a
      dining room. --Shak.
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            All the odd words they have picked up in a
            coffeehouse, or a gaming ordinary, are produced as
            flowers of style.                     --Swift.
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            He exacted a tribute for licenses to hawkers and
            peddlers and to ordinaries.           --Bancroft.
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   6. (Her.) A charge or bearing of simple form, one of nine or
      ten which are in constant use. The bend, chevron,
      chief, cross, fesse, pale, and saltire are
      uniformly admitted as ordinaries. Some authorities include
      bar, bend sinister, pile, and others. See Subordinary.
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   In ordinary.
      (a) In actual and constant service; statedly attending and
          serving; as, a physician or chaplain in ordinary. An
          ambassador in ordinary is one constantly resident at a
          foreign court.
      (b) (Naut.) Out of commission and laid up; -- said of a
          naval vessel.

   Ordinary of the Mass (R. C. Ch.), the part of the Mass
      which is the same every day; -- called also the canon of
      the Mass.
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The Collaborative International Dictionary of English v.0.48:

Mass \Mass\ (m[.a]s), n. [OE. masse, messe, AS. maesse. LL.
   missa, from L. mittere, missum, to send, dismiss: cf. F.
   messe. In the ancient churches, the public services at which
   the catechumens were permitted to be present were called
   missa catechumenorum, ending with the reading of the Gospel.
   Then they were dismissed with these words : "Ite, missa est"
   [sc. ecclesia], the congregation is dismissed. After that the
   sacrifice proper began. At its close the same words were said
   to those who remained. So the word gave the name of Mass to
   the sacrifice in the Catholic Church. See Missile, and cf.
   Christmas, Lammas, Mess a dish, Missal.]
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   1. (R. C. Ch.) The sacrifice in the sacrament of the
      Eucharist, or the consecration and oblation of the host.
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   2. (Mus.) The portions of the Mass usually set to music,
      considered as a musical composition; -- namely, the Kyrie,
      the Gloria, the Credo, the Sanctus, and the Agnus Dei,
      besides sometimes an Offertory and the Benedictus.
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   Canon of the Mass. See Canon.

   High Mass, Mass with incense, music, the assistance of a
      deacon, subdeacon, etc.

   Low Mass, Mass which is said by the priest throughout,
      without music.

   Mass bell, the sanctus bell. See Sanctus.

   Mass book, the missal or Roman Catholic service book.
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The Collaborative International Dictionary of English v.0.48:

canon \can"on\ (k[a^]n"[u^]n), n. [OE. canon, canoun, AS. canon
   rule (cf. F. canon, LL. canon, and, for sense 7, F. chanoine,
   LL. canonicus), fr. L. canon a measuring line, rule, model,
   fr. Gr. kanw`n rule, rod, fr. ka`nh, ka`nnh, reed. See
   Cane, and cf. Canonical.]
   1. A law or rule.
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            Or that the Everlasting had not fixed
            His canon 'gainst self-slaughter.     --Shak.
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   2. (Eccl.) A law, or rule of doctrine or discipline, enacted
      by a council and confirmed by the pope or the sovereign; a
      decision, regulation, code, or constitution made by
      ecclesiastical authority.
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            Various canons which were made in councils held in
            the second centry.                    --Hook.
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   3. The collection of books received as genuine Holy
      Scriptures, called the sacred canon, or general rule of
      moral and religious duty, given by inspiration; the Bible;
      also, any one of the canonical Scriptures. See Canonical
      books, under Canonical, a.
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   4. In monasteries, a book containing the rules of a religious
      order.
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   5. A catalogue of saints acknowledged and canonized in the
      Roman Catholic Church.
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   6. A member of a cathedral chapter; a person who possesses a
      prebend in a cathedral or collegiate church.
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   7. (Mus.) A musical composition in which the voices begin one
      after another, at regular intervals, successively taking
      up the same subject. It either winds up with a coda
      (tailpiece), or, as each voice finishes, commences anew,
      thus forming a perpetual fugue or round. It is the
      strictest form of imitation. See Imitation.
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   8. (Print.) The largest size of type having a specific name;
      -- so called from having been used for printing the canons
      of the church.
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   9. The part of a bell by which it is suspended; -- called
      also ear and shank.

   Note: [See Illust. of Bell.] --Knight.
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   10. (Billiards) See Carom.
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   Apostolical canons. See under Apostolical.

   Augustinian canons, Black canons. See under
      Augustinian.

   Canon capitular, Canon residentiary, a resident member of
      a cathedral chapter (during a part or the whole of the
      year).

   Canon law. See under Law.

   Canon of the Mass (R. C. Ch.), that part of the mass,
      following the Sanctus, which never changes.

   Honorary canon, a canon[6] who neither lived in a
      monastery, nor kept the canonical hours.

   Minor canon (Ch. of Eng.), one who has been admitted to a
      chapter, but has not yet received a prebend.

   Regular canon (R. C. Ch.), one who lived in a conventual
      community and followed the rule of St. Austin; a Black
      canon.

   Secular canon (R. C. Ch.), one who did not live in a
      monastery, but kept the hours.
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