(animal anatomy) a breathing organ of fish and other aquatic animals / (of a fish) a gill slit or gill cover

To remove the gills from a fish as part of gutting and cleaning it. / (transitive) To catch (a fish) in a gillnet. / (intransitive) To be or become entangled in a gillnet.

a drink measure for spirits and wine (size varies regionally but it is about one quarter of a pint) / (archaic, Britain) a measuring jug holding a quarter or half a pint

(Britain) rivulet / (Britain) ravine

a two-wheeled frame for transporting timber

a female ferret / (obsolete) a promiscuous woman; harlot, wanton / (obsolete) a prostitute

(obsolete) To act as a prostitute.

a venomous lizard, Heloderma suspectum, that lives in the deserts of the southwestern USA and northwestern Mexico

A diminutive of the male given names Giles, Julian, or William, of medieval usage. / A diminutive of the female given name Gillian, variant of Jill.

(soccer) Someone connected with Gillingham Football Club, as a fan, player, coach etc.