Odd Number
noun, の adjective
Odd numbers are odd numbers (as in, 1, 3, 5, 7, though they are a bit strange as well).
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
奇数とは2で割り切れない数字のことです。
Odd numbers are numbers that cannot be divided by two.