from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. Loose knickers bagging below the knees, worn formerly for sports.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Trousers that extend four inches below the knee, traditionally associated with sports, especially golf.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. men's baggy knickers hanging below the knees; formerly worn for sports (especially golf)
Stenning heaved himself up out of the rear cockpit and jumped down; he was in plus fours and a flying helmet.
We secured a table on the shady patioa great place, really, a place of peace; you could imagine Scotsmen in caps and plus fours sitting there a hundred years earlier.