/ ˌɪnsɪgˈnɪfɪkənt; NAmE / adjective
not big or valuable enough to be considered important :
an insignificant difference
The levels of chemicals in the river are not insignificant.
He made her feel insignificant and stupid.
OPP significant
► in·sig·nifi·cance / -kəns; NAmE / noun [ U ]:
Her own problems paled into insignificance beside this terrible news.
► in·sig·nifi·cant·ly adverb