mean anything/something, be of importance, be of consequence, be important, be significant, be of significance, carry weight, be of account, count, matter, be relevant;
informal cut any ice
“the locked door doesn’t necessarily signify”
2.
US informal
(among black Americans) exchange boasts or insults as a game or ritual.
“I wasn’t signifying at her”
Origin
Middle English: from Old French signifier, from Latin significare ‘indicate, portend’, from signum ‘token’.