1. To become or cause to become obstructed; SYN. choke off, clog up, back up, congest, choke, foul.
2. To coalesce or unite in a mass; SYN. clot.
3. To fill to excess so that function is impaired; SYN. overload.
4. To impede the motion of, as with a chain or a burden.
5. To impede with a clog or as if with a clog.
6. To dance a clog dance.

ETYM Old Eng. clogge clog, Scot. clag, a clot, to to obstruct, cover with mud or anything adhesive; prob. of the same origin as Eng. clay.
1. Any object that acts as a hindrance or obstruction.
2. Footwear usually with wooden soles; SYN. geta, patten, sabot.