(transitive) To read and look for errors or problems.

present participle of check over

present participle of double check

simple past tense and past participle of triple check

simple past tense and past participle of double check

present participle of triple check

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

To check again; to check with extra caution or attention; to verify or make sure.

(US, often used without "off") To mark items on a list (with a checkmark or by crossing them out) that have been chosen for keeping or removal or that have been dealt with (for example, completed or verified as correct or satisfactory); to tick off (UK), tick (UK), cross off, strike off.

A single-digit checksum.