Old English fyllan "to fill, make full, fill up, replenish, satisfy; complete, fulfill," from Proto-Germanic *fulljanan "to fill" (source also of Old Saxon fulljan, Old Norse fylla, Old Frisian fella, Dutch vullen, German füllen, Gothic fulljan "to fill, make full"), a derivative of adjective *fullaz "full" (see full (adj.)). Related: Filled.

To fill the bill (1882) originally was U.S. theatrical slang, in reference to a star of such magnitude his or her name would be the only one on a show's poster. To fill out "write in required matter" is recorded from 1880.

early 15c. (in fulling mill), verbal noun from full (v.).

"full of song," c. 1400, from song (n.) + -ful. Related: Songfully.

1550s, "perfect, faultless;" c. 1600, "abundantly full," also "full of life or spirit," also "plentifully supplied" (with money, etc.), perhaps from flush (v.1) through the notion of a river running full, hence level with its banks. Meaning "even, level" is from 1620s, originally of ship's decks. In general use by 1791; in typography, 1900; in pugilism, 1812.

"full of or resembling lard," 1799; see lard (n.) + -aceous.

"full of news, gossipy," 1832 from news (n.) + -y (2). Related: Newsily; newsiness.

"having full, bulging, or prominent eyes," 1820; see pop (v.) + -eyed.

"brought to a full or completed state," 1746, past-participle adjective from round (v.).

"full of rancor, implacably spiteful," 1580s, from rancor + -ous. Related: Rancorously; rancorousness.

early 15c., from Latin ulcerosus "full of sores," from stem of ulcus (see ulcer).