To press and hold down (a button)

plural of long ess

plural of long s

Alternative form of long s

plural of long paddock

(automotive) An engine subassembly that consists of the assembled short block, plus the crankshaft, cylinder head, camshaft (usually), and valve train.

plural of long block

Alternative letter-case form of long Covid

trousers as opposed to shorts

(chess) To castle on the queenside.