odd /ˈɑːd/ adjective
Learner's definition of ODD
[also more odd; most odd] odder; oddest : strange or unusual : different from what is normal or expected
always used before a noun : happening in a way that is not planned or regular
always used before a noun : of different kinds or types
always used before a noun : not matched or paired with another thing or person
: not able to be divided into two equal whole numbers
: marked by an odd number
informal : a little more than a particular number used in combination with a number

the odd man/one out

: the person or thing that is different from the other members of a group

— oddness

noun [noncount]