(obsolete) An onion. / The bulb-shaped root portion of a plant such as a tulip, from which the rest of the plant may be regrown. / (dated, neuroanatomy) The medulla oblongata.

(intransitive) To take the shape of a bulb; to swell.

Shaped like a bulb.

present participle of bulb

plural of bulb

Third-person singular simple present indicative form of bulb

An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light.

An internal combustion engine in which the fuel is ignited by hot, compressed gas rather than a spark

(informal) A person who is slow-witted or stupid.

Slow-witted, stupid.