clag /klæɡ/noun 4verb 3forms 3 noun4 •Low cloud, fog or smog.The sky was thick with dirty gray clag — 1993 •A glue or paste made from starch. •(slang) Bits of rubber which are shed from tires during a race and collect off the racing line, especially on the outside of corners (cf. marbles).He ran wide in the corner, hit the clag and spun off. •Unburned carbon (smoke) from a steam or diesel locomotive, or multiple unit. verb3 •To stick, like boots in mudWash the rice well in two waters, if you don't wash 'em, 'e will clag [clag means get sticky] and put 'em in a pot of well-salted boiling water. — 1999 •To hit •(no longer used) To encumberAs when the orchard boughes are clag'd with fruite — 1620 formsclagged · clagging · clags