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."