—v.t. 1. to close, shut, or stop up (a passage, opening, etc.).
2. to shut in, out, or off.
3. Physical Chem.(of certain metals and other solids) to incorporate (gases and other foreign substances), as by absorption or adsorption.
—v.i. 1. Dentistry.to shut or close, with the cusps of the opposing teeth of the upper and lower jaws fitting together.
2. Meteorol.to form an occluded front.