One of a race of brutes, who look and act similar to men, inhabiting the same land as the civilized Houyhnhnms.
An employee of the Internet company Yahoo!.
An employee or other worker with some particular function or skill.
A spy, secret agent, or detective.
A participant in an operation.
Functional, in working order.
Effectual or important.
Having the power of acting; hence, exerting force, physical or moral; active in the production of effects.
Producing the appropriate or designed effect; efficacious.
Based upon, or consisting of, a surgical operation or operations.