(feminine) sock (covering for the foot; originally short form of meia-calça)
(Brazil,abbreviation,alt-of,ellipsis,feminine) Ellipsis of meia-entrada. (a ticket sold for half its normal price, as required by law, for students and children)
(Portugal,feminine,historical) obsolete unit of measure for liquids, equivalent to six pints
(feminine) half past (short form of meia hora)

feminine singular of meio

Misconstruction of meio

six (6, used instead of seis when it’s necessary to avoid confusion with rhyme três; short form of meia dúzia)