bulb /ˈbʌlb/noun 6verb 1forms 3phrases 1 noun6 •The bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.the plants which grow in the earth from seed or bulbs. — 2005 •A light bulb (not necessarily bulbous in shape). •Any solid object rounded at one end and tapering on the other, possibly attached to a larger object at the tapered end. •A bulbous protuberance at the forefoot of certain vessels to reduce turbulence. •(old-fashioned) The medulla oblongata. •(no longer used) An onion. verb1 •To take the shape of a bulb; to swell. formsbulbed · bulbing · bulbs Phrases with bulb light-bulb momentA moment of enlightenment, inspiration or sudden realization.
