1. check up - Noun
2. check up - Verb
(most often in phrasal verb "check up on") To verify through brief investigation or revisit for assurance that there are no problems.
I dropped by to check up on my friend.
To verify something's accuracy.
He's checking up the figures.
To seem correct or plausible; to comport with known facts; to check out (with other facts).
The numbers she provided check up with my own data.
check-up (plural check-ups)
(often used attributively) Alternative form of checkup
check-up
It is good to have money and the things that money can buy, but it's good too, to check up once in a while and make sure you haven't lost the things money can't buy. George Horace Lorimer
Good Lord, I went in for a check up the other day and the doctor said "You need to lay off eggs." I go "Is my cholesterol bad?" He said "No, your farts are killing everybody in this room." Larry the Cable Guy
We intend to check up on the fitness of our small units...If each such particle attains real efficiency and brings genuine military skill to our large units, our troops, should they be called upon to fight, will carry out their operations without sustaining heavy losses. Semyon Timoshenko
You don't have to talk to someone to think about them and check up on them now and again. Emily Giffin
If it was Europe, I just picked a country that I hadn't been to, but I didn't try to check up on what was going on in the country or anything like that. I just went and had a good time and met a lot of very nice people who are still my friends. Lee Hazlewood
My husband came up to Hot Rocks to check up on me, why is still unknown to me because if I was to cheat on him it wouldn't be in a neighborhood bar where he knows I am. Kim Mathers