Definition of "Odd" :

adjective: not easily explained

"It is odd that his name is never mentioned."

adjective: not divisible by two

adjective: an indefinite quantity more than that specified

"Invited 30-odd guests."

adjective: not used up

"Some odd dollars left."

adjective: beyond or deviating from the usual or expected

"Had an odd name."

adjective: of the remaining member of a pair

"An odd glove."