The meaning of BALLAST is a heavy substance (such as rocks or water) placed in such a way as to improve stability and control (as of the draft of a ship or the buoyancy of a balloon or …

Ballast is dense material used as a weight to provide stability to a vehicle or structure. Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or …

Compressed air is used to blow seawater out of more than a dozen ballast tanks, increasing the sub's buoyancy so it can surface.

Definition of ballast noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A balast is a crucial electrical component used in various lighting systems, particularly in fluorescent and HID (High-Intensity Discharge) lamps. Its primary function is to limit the …

BALLAST definition: any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability. See examples of ballast used in a sentence.

Dec 14, 2025 · ballast (third-person singular simple present ballasts, present participle ballasting, simple past and past participle ballasted) (transitive) To stabilize or load a ship with ballast.