Meaning of “be left out” - Learner’s Dictionary

be left out

phrasal verb with leave uk us /liːv/ verb (past tense and past participle left /left/)

If someone feels left out, they are unhappy because they have not been included in an activity:

The older children had gone upstairs to play and she felt left out.

(Definition of “be left out” from the Cambridge Learner’s Dictionary © Cambridge University Press)