a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters
"The recipe called for exactly two gills of heavy cream, which is half a pint in the old British system."
a United States liquid unit equal to 4 fluid ounces
"The chef measured out exactly two gills of cream to finish the sauce."
a breathing organ of fish and other aquatic animals
"The local pub was packed with true gills celebrating their team's victory in the promotion playoff."
a drink measure for spirits and wine (size varies regionally but it is about one quarter of a pint)
rivulet
a two-wheeled frame for transporting timber
a leech
a female ferret
Someone connected with Gillingham Football Club, as a fan, player, coach etc.
In plain English: A "gill" is a supporter or member of the Gillingham football team.
"As a lifelong Gill, she's been following Gillingham since she was a little girl."
Usage: Use "gill" to refer specifically to the breathing organs of fish or, in British contexts, as a unit for measuring spirits. Do not confuse this term with general measures like a pint when discussing alcohol volume outside regional traditions.
To remove the gills from a fish as part of gutting and cleaning it.
"She was accused of gilling in the dimly lit alley behind the theater."
To act as a prostitute.
In plain English: To "gill" means to earn money by providing sexual services.
"The police suspected she was willing to gill for extra money."
A diminutive of the male given names Giles, Julian, or William, of medieval usage.
"The old manuscript records a gill who served as a scribe in the twelfth century."
From Middle English gille, gylle ("gill"), of North Germanic origin, akin to Danish gælle, Swedish gäl, Norwegian gjelle, and further to Old Norse gjǫlnar ("lips"), which also may have had the meaning of "gills" (based on Old Danish fiskegæln ("gills")). The Old Norse word has been suggested as deriving from Proto-Germanic gelunō ("jaw"), from Proto-Indo-European gʰel-, which would make it root-cognate to Ancient Greek χελύνη (khelúnē, "lip, jaw"), χεῖλος (kheîlos, "lip").