A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

close up • close-up
close up —
1
. close completely: The wound is closing up but
underneath it it’s still a little tender and bruised. 2. come
nearer to each other: As soon as he saw the movement of the
crowd the captain gave the order to his men to close up. 3. (of
a shop, etc.) close (for a short time): By the time we got to the
main dealer’s room, it was already closing up for the day. 4.
(coll.) become silent or secretive: We had a good conversation
before I asked, but when I asked, he closed up and looked
away.
close-up —
1
. (Photography, TV) a shot taken from a position
very close to the subject: The film, with a surplus of gigantic
close-ups, seems more calculated to appeal to American than
British audiences. 2. a detailed picture or display of smth.:
This experience provided me with a close-up of how a halftime
show is produced and executed.
close up a shop • close up shop
close up a shop —(also: shut up a shop) close a shop securely
before leaving (for the weekend, etc.): The shop was closed
up for the night, so Kermit used his key and went up the back
way.
close up shop —(also: shut up shop) 
1
. (of an office, firm, etc.)
stop doing business for the day or more: The restaurant will
not close up shop until 
11
P
.
M
. every night of the week. 2. go
out of business: Mr. Lemoyne had reluctantly closed up shop
when the library had reached a rock-bottom membership of
eleven.
Note: 
The expression does not correlate in meaning with the
phrase closed shop— a plant or factory that employs only union
workers: Under a closed shop agreement, non-union employees
must join the union or face dismissal.
closed case • open-and-shut case
closed case —a legal case that has been decided: Trying to re-
open a closed case is a very difficult, time consuming (and
usually expensive) process.
open-and-shut case —a legal case that is easily settled or de-
cided: The jury feels this is an open-and-shut case but Sir
John experiences doubts.