Meaning of “small” - Learner’s Dictionary

small

adjective uk us /smɔːl/
LITTLE

A1 little in size or amount:

They live in a small apartment near Times Square.
We teach the children in small groups.
YOUNG

A1 A small child is very young:

a woman with three small children
NOT IMPORTANT

A2 not important or serious:

a small mistake
Jenny's got a small part in the school play.
feel small

to feel stupid or unimportant:

Simon was always trying to make me feel small.

(Definition of “small adjective” from the Cambridge Learner’s Dictionary © Cambridge University Press)