quarterly

adj. occurring every three months, taking place four times a year

n. periodical which is published four times a year

adv. four times a year, once every three months

Magazines, periodicals or serials are publications, generally published on a regular schedule, containing a variety of articles, generally financed by advertising, by a purchase price, or both.
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Noun
1. a periodical that is published every quarter
(hypernym) series, serial, serial publication
Adjective
1. of or relating to or consisting of a quarter; "quarterly report"
(pertainym) quarter
Adverb
1. in diagonally opposed quarters of an escutcheon; "two coats of arms borne quarterly"
2. in three month intervals; "interest is compounded quarterly"
(synonym) every quarter

(n.)
A periodical work published once a quarter, or four times in a year.
  

(adv.)
In quarters, or quarterings; as, to bear arms quarterly; in four or more parts; -- said of a shield thus divided by lines drawn through it at right angles.
  

(adv.)
By quarters; once in a quarter of a year; as, the returns are made quarterly.
  

(a.)
Recurring during, or at the end of, each quarter; as, quarterly payments of rent; a quarterly meeting.
  

(a.)
Containing, or consisting of, a fourth part; as, quarterly seasons.
  

Occurring every three months.