(... are attributes of evenness) being level or straight or regular and without variation as e.g. in shape or texture; or being in the same plane or at the same height as something else (i.e. even with)
"an even application of varnish""an even floor""the road was not very even""the picture is even with the window"
Definition 3: the parity of even numbers (divisible by two) - [noun denoting linkdef]
(evenness is a kind of ...) (mathematics) a relation between a pair of integers: if both integers are odd or both are even they have the same parity; if one is odd and the other is even they have different parity
"parity is often used to check the integrity of transmitted data"