Dictionary definition · close up
verb
- cease to operate or cause to cease operating"The owners decided to move and to close the factory"
- block passage through"obstruct the path"
- unite or bring into contact or bring together the edges of"close the circuit"
- refuse to talk or stop talking; fall silent"The children shut up when their father approached"
adverb
- very close"without my reading glasses I can hardly see things close up"
Source: Open English WordNet (CC BY 4.0).