Longman Dictionary of Contemporary English - sock

~1 ~3 n 1 a piece of clothing made of soft material that you wear on your foot inside your shoe  (a pair of cotton socks) 2 give sb/sth a sock informal to hit someone or something very hard, especially with your hand closed 3 pull your socks up BrE informal to make an effort to improve your behaviour or your work  (If you don't pull your socks up, you'll fail the exam.) 4 put a sock in it BrE informal used to tell someone in a joking way to stop talking 5 knock sb's socks off AmE informal to surprise someone very much  (When I saw all the people there, it knocked my socks off!) ~2 v 1 informal to hit someone very hard  (He socked the intruder on the jaw.) 2 sock it to sb old-fashioned to tell someone something in a direct and forceful way  (Go on, sock it to him!) sock in phr v AmE be socked in if an airport, road, or area is socked in, it is very difficult to see far because of bad fog, snow, or rain