1. (In combination) An indefinite quantity more than that specified
2. Not divisible by two.
3. Not easily explained; peculiar or unusual
4. Of the remaining member of a pair, of socks e.g.; SYN. unmatched, unmated, unpaired.
ETYM as. unefen. Related to Un- not, and Even.
Not even or uniform as e.g. in shape or texture.