(1):

(v. i.) To engage with each other, as the teeth of wheels.

(2):

(n.) The engagement of the teeth of wheels, or of a wheel and rack.

(3):

(n.) The opening or space inclosed by the threads of a net between knot and knot, or the threads inclosing such a space; network; a net.

(4):

(v. t.) To catch in a mesh.