A tool employing a chamber with a colored liquid and an air bubble, used to determine if a surface is level horizontally, vertically, or at a 45-degree angle.

(rail transport, informal) a single-car multiple unit / A small three-wheel motor vehicle in a category between a motorbike and a car

(Britain, New Zealand) Cabbage and mashed potatoes etc. fried together. / (Cockney rhyming slang) A Greek.

A small pocket of air inside a solid, a liquid or surrounded by a colloid within a larger fluid environment.

A rounded outline, containing words, representing speech in a cartoon.

Alternative form of bubblegum

(US, slang) Large, rounded buttocks. / (US, slang) A fat person.

(motor racing) The bottom qualifying position in a race, on the outside of the last row at the starting line.

(sports, particularly NCAA basketball, and some esports, particularly Rocket League) A team on the bubble for an upcoming tournament.

A bath in which an additive is poured directly into the water that creates bubbles. / A soap-based product to be added to a bath to create bubbles. / (Cockney rhyming slang) A laugh.