different to what is usual or expected; strange

the neighbours thought him very odd

it's odd that she didn't recognize me

(of whole numbers such as 3 and 5) having one left over as a remainder when divided by two

atoms which possess an odd number of electrons

happening or occurring infrequently and irregularly; occasional

we have the odd drink together

separated from a usual pair or set and therefore out of place or mismatched

he's wearing odd socks