• Check out: Confirm and pay for goods and services at a facility when leaving
• Check out: Withdraw (an item), as from a library, and have the withdrawal recorded
• Check out: Record (someone) as leaving the premises or as taking something therefrom, as from a library or shop
• Check out: Examine, inspect, look at closely, ogle; to investigate
• Check out: Prove (after an investigation) to be the case / in order
• Check up: Verify through brief investigation or examination
• Check up on: Examine or inspect something in order to determine its condition
