The Collaborative International Dictionary of English v.0.48:

Weekly \Week"ly\, a.
   1. Of or pertaining to a week, or week days; as, weekly
      labor.
      [1913 Webster]

   2. Coming, happening, or done once a week; hebdomadary; as, a
      weekly payment; a weekly gazette.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Weekly \Week"ly\, n.; pl. Weeklies.
   A publication issued once in seven days, or appearing once a
   week.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Weekly \Week"ly\, adv.
   Once a week; by hebdomadal periods; as, each performs service
   weekly.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cyclic \Cyc"lic\ (s?k"l?k or s?"kl?k), Cyclical \Cyc"lic*al\
   (s?k"l?-kal), a. [Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos
   See Cycle.]
   1. Of or pertaining to a cycle or circle; moving in cycles;
      as, cyclical time. --Coleridge.
      [1913 Webster]

   2. (Chemistry) Having atoms bonded to form a ring structure.
      Opposite of acyclic.

   Note: Used most commonly in respect to organic compounds.

   Note: [Narrower terms: bicyclic; heterocyclic;
         homocyclic, isocyclic]

   Syn: closed-chain, closed-ring.
        [WordNet 1.5]

   3. Recurring in cycles[2]; having a pattern that repeats at
      approximately equal intervals; periodic. Opposite of
      noncyclic.

   Note: [Narrower terms: alternate(prenominal),
         alternating(prenominal); alternate(prenominal), every
         other(prenominal), every second(prenominal);
         alternating(prenominal), oscillating(prenominal);
         biyearly; circadian exhibiting 24-hour
         periodicity); circular; daily, diurnal;
         fortnightly, biweekly; hourly; midweek,
         midweekly; seasonal; semestral, semestrial;
         semiannual, biannual, biyearly; semiweekly,
         biweekly; weekly; annual, yearly; biennial;
         bimonthly, bimestrial; half-hourly; half-yearly;
         monthly; tertian, alternate(prenominal);
         triennial]
         [WordNet 1.5]

   4. Marked by repeated cycles[2].
      [WordNet 1.5]

   Cyclic chorus, the chorus which performed the songs and
      dances of the dithyrambic odes at Athens, dancing round
      the altar of Bacchus in a circle.

   Cyclic poets, certain epic poets who followed Homer, and
      wrote merely on the Trojan war and its heroes; -- so
      called because keeping within the circle of a single
      subject. Also, any series or coterie of poets writing on
      one subject. --Milman.
      [1913 Webster]

WordNet (r) 3.0 (2006):

weekly
    adv 1: without missing a week; "she visited her aunt weekly"
           [syn: hebdomadally, weekly, every week, each
           week]
    adj 1: of or occurring every seven days; "a weekly visit";
           "weekly paper" [syn: weekly, hebdomadal,
           hebdomadary]
    n 1: a periodical that is published every week (or 52 issues per
         year)