check out is a verb meaning "examine so as to determine accuracy, quality, or condition". It carries 7 recorded senses.
examine so as to determine accuracy, quality, or condition
“check the brakes”
“Check out the engine”
record, add up, and receive payment for items purchased
“She was checking out the apples that the customer had put on the conveyer belt”
Definitions, synonyms and semantic relations for check out come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.