From Longman Dictionary of Contemporary Englishclose up phrasal verb1close something ↔ upSHUT/CLOSE if a shop or building closes up or is closed up, it stops being open to the public for a period of timeThe resorts are all closed up for the season.2close up shop to stop doing something for a period of time or permanentlyWhen it rains, there is no alternative but to close up shop.3NEARif a group of people close up, they move closer together4CURE close something ↔ upHEALTHY if a wound closes up or if someone closes it up, the edgesgrow together again or are sewn togetherThe scar is closing up nicely – it’ll soon be time to take the stitches out.5to become narrower or to shutThe flowers close up at night.Occasionally the channel widened then closed up tight again.6EMOTIONALto refuse to talk to someone about somethingThe moment I said I was a police officer, everyone would close up like a clam. →close→ See Verb table
close-upclose-up /ˈkləʊs ʌp $ ˈkloʊs-/ noun [countable, uncountable]TCPNEARa photograph or part of a film in which the camera seems to have been very close to the picture it tookclose-up ofa close-up of her facein close-upMuch of the movie is shot in close-up.
Examples from the Corpus
close-up• She brought the camera forward to get a close-up of the actor's face.• I want to get a close-up of the children's faces.• The placing of the head in a close-up is important.• Another is a close-up of a mud-encrusted hand reaching back toward a worker at the top of a precarioustwigladder.• I mean, I don't like seeing myself on camera in close-up, but then I never did.• The camera pans over the players as they write, showing each one in close-up.• Each butterfly had been photographed in close-up so that you could see every detail.• I decided not to tell him about my close-up 0f his unguarded sleeping face.• Long and mediumshots, rather than close-ups, can hidebags under the eyes.• I rediscovered them on the screen in the close-ups of objects which impressed and influenced me.• It doesn't stepoutside time, but accentuates its effects and brings them into unbearableclose-up.in close-up• Much of the movie is shotin close-up.