NOUN (1)

1. a reception held in your own home;


ADVERB (2)

1. on the home team's field;
- Example: "they played at home last night"

2. at, to, or toward the place where you reside;
- Example: "he worked at home"

The Collaborative International Dictionary of English v.0.48:

Home \Home\ (h[=o]m; 110), n. [OE. hom, ham, AS. h[=a]m; akin to
   OS. h[=e]m, D. & G. heim, Sw. hem, Dan. hiem, Icel. heimr
   abode, world, heima home, Goth. haims village, Lith.
   k["e]mas, and perh. to Gr. kw`mh village, or to E. hind a
   peasant; cf. Skr. ksh[=e]ma abode, place of rest, security,
   kshi to dwell. [root]20, 220.]
   1. One's own dwelling place; the house in which one lives;
      esp., the house in which one lives with his family; the
      habitual abode of one's family; also, one's birthplace.
      [1913 Webster]

            The disciples went away again to their own home.
                                                  --John xx. 10.
      [1913 Webster]

            Home is the sacred refuge of our life. --Dryden.
      [1913 Webster]

            Home! home! sweet, sweet home!
            There's no place like home.           --Payne.
      [1913 Webster]

   2. One's native land; the place or country in which one
      dwells; the place where one's ancestors dwell or dwelt.
      "Our old home [England]." --Hawthorne.
      [1913 Webster]

   3. The abiding place of the affections, especially of the
      domestic affections.
      [1913 Webster]

            He entered in his house -- his home no more,
            For without hearts there is no home.  --Byron.
      [1913 Webster]

   4. The locality where a thing is usually found, or was first
      found, or where it is naturally abundant; habitat; seat;
      as, the home of the pine.
      [1913 Webster]

            Her eyes are homes of silent prayer.  --Tennyson.
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            Flandria, by plenty made the home of war. --Prior.
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   5. A place of refuge and rest; an asylum; as, a home for
      outcasts; a home for the blind; hence, esp., the grave;
      the final rest; also, the native and eternal dwelling
      place of the soul.
      [1913 Webster]

            Man goeth to his long home, and the mourners go
            about the streets.                    --Eccl. xii.
                                                  5.
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   6. (Baseball) The home base; as, he started for home.
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   At home.
      (a) At one's own house, or lodgings.
      (b) In one's own town or country; as, peace abroad and at
          home.
      (c) Prepared to receive callers.

   Home department, the department of executive
      administration, by which the internal affairs of a country
      are managed. [Eng.]

   To be at home on any subject, to be conversant or familiar
      with it.

   To feel at home, to be at one's ease.

   To make one's self at home, to conduct one's self with as
      much freedom as if at home.

   Syn: Tenement; house; dwelling; abode; domicile.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

At \At\, prep. [AS. [ae]t; akin to OHG. az, Goth., OS., & Icel.
   at, Sw. [*a]t, Dan. & L. ad.]
   Primarily, this word expresses the relations of presence,
   nearness in place or time, or direction toward; as, at the
   ninth hour; at the house; to aim at a mark. It is less
   definite than in or on; at the house may be in or near the
   house. From this original import are derived all the various
   uses of at. It expresses:
   [1913 Webster]

   1. A relation of proximity to, or of presence in or on,
      something; as, at the door; at your shop; at home; at
      school; at hand; at sea and on land.
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   2. The relation of some state or condition; as, at war; at
      peace; at ease; at your service; at fault; at liberty; at
      risk; at disadvantage.
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   3. The relation of some employment or action; occupied with;
      as, at engraving; at husbandry; at play; at work; at meat
      (eating); except at puns.
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   4. The relation of a point or position in a series, or of
      degree, rate, or value; as, with the thermometer at
      80[deg]; goods sold at a cheap price; a country estimated
      at 10,000 square miles; life is short at the longest.
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   5. The relations of time, age, or order; as, at ten o'clock;
      at twenty-one; at once; at first.
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   6. The relations of source, occasion, reason, consequence, or
      effect; as, at the sight; at this news; merry at anything;
      at this declaration; at his command; to demand, require,
      receive, deserve, endure at your hands.
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   7. Relation of direction toward an object or end; as, look at
      it; to point at one; to aim at a mark; to throw, strike,
      shoot, wink, mock, laugh at any one.
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   At all, At home, At large, At last, At length, At
   once, etc. See under All, Home, Large, Last (phrase
      and syn.), Length, Once, etc.

   At it, busily or actively engaged.

   At least. See Least and However.

   At one. See At one, in the Vocabulary.
      [1913 Webster]

   Syn: In, At.

   Usage: When reference to the interior of any place is made
          prominent in is used. It is used before the names of
          countries and cities (esp. large cities); as, we live
          in America, in New York, in the South. At is commonly
          employed before names of houses, institutions,
          villages, and small places; as, Milton was educated at
          Christ's College; money taken in at the Customhouse; I
          saw him at the jeweler's; we live at Beachville. At
          may be used before the name of a city when it is
          regarded as a mere point of locality. "An English king
          was crowned at Paris." --Macaulay. "Jean Jacques
          Rousseau was born at Geneva, June, 28, 1712." --J.
          Morley. In regard to time, we say at the hour, on the
          day, in the year; as, at 9 o'clock, on the morning of
          July 5th, in the year 1775.
          [1913 Webster]

WordNet (r) 3.0 (2006):

at home
    adv 1: on the home team's field; "they played at home last
           night"
    2: at, to, or toward the place where you reside; "he worked at
       home"
    n 1: a reception held in your own home

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "at home":
   affair, assemblee, assembly, assignation, at ease, at rest,
   back home, ball, brawl, caucus, chez soi, colloquium, commission,
   committee, conclave, concourse, congregation, congress,
   conventicle, convention, convocation, council, dance, date, diet,
   down home, easy, eisteddfod, festivity, fete, forgathering, forum,
   gathering, get-together, housewarming, levee, matinee, meet,
   meeting, panel, party, plenum, prom, quorum, rally, reception,
   relaxed, rendezvous, reunion, salon, seance, session, shindig,
   sit-in, sitting, sociable, social, social affair, social gathering,
   soiree, symposium, synod, turnout, wake