1. An obstruction or hindrance.

2. A weight, such as a block, attached to the leg of an animal to hinder movement.

3. A heavy, traditionally wooden-soled shoe.

1. To obstruct movement on or in; block up: Heavy traffic clogged the freeways.

2. To hamper the function or activity of; impede: "attorneys clogging our courts with actions designed to harass state and local governments" (Roslyn L. Anderson and Patricia L. Irvin).

1. To become obstructed or choked up: The pipes had clogged with rust.

2. To thicken or stick together; clot.

3. To do a clog dance.