To seem correct or plausible; to comport with known facts; to check out (with other facts).
I dropped by to check up on my friend.
To verify through brief investigation or revisit for assurance that there are no problems.
To verify something's accuracy.
To watch a location and/or people, generally covertly.
To mark off the limits by stakes
To end the game by hitting the stake peg in the middle of the court.