(intransitive) To produce bubbles, to rise up in bubbles (such as in foods cooking or liquids boiling). / (intransitive, figuratively) To churn or foment, as if wishing to rise to the surface.

A spherically contained volume of air or other gas, especially one made from soapy liquid. / A small spherical cavity in a solid material. / (by extension) Anything resembling a hollow sphere.

simple past tense and past participle of bubble

Third-person singular simple present indicative form of bubble in

simple past tense and past participle of bubble in

to mark a response on a form, particularly on a multiple-choice exam, by filling in a circular area (‘bubble’)

plural of bubble

(slang) Sparkling wine; champagne.

Third-person singular simple present indicative form of bubble

(motor racing) Holding the last qualifying position with qualification still in progress, and thus liable to lose that position.