A fourth part of a pint measure; a seaman's daily allowance of rum, which formerly was half a pint.
·noun A young woman; a sweetheart. ·see <<Gill>>. ...
Webster's Dictionary of the English Language
, gill a pint. Yorks. ...
A glossary of provincial and local words used in England by Francis Grose
·noun A light, giddy, or wanton girl or woman. ·see Gill-flirt. ...