triple check

noun, verb — 2 senses

noun

A third check, a verification made a third time, usually with additional caution or attention.

Did you make a double check and a triple check of the entire minefield before proceeding?

verb

To check a third time; to check thrice, with extra caution or attention; to reverify or make sure yet again.

Did you double check and triple check of the entire minefield before proceeding?

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.