odd one out

noun

(countable) Something or someone in a group that is different or exceptional, that does not fit.

The elephant, lion, and giraffe are all animals, but the giraffe is the odd one out.

意味（1）

(countable) Something or someone in a group that is different or exceptional, that does not fit.

意味（2）

(uncountable) A visual puzzle where the guesser has to choose which word/picture/symbol etc. does not fit with the others.