Something with three legs. / An intersection where three roads meet.

plural of three-way

(attributive) Relating to three different directions.

Sexual activity involving three persons; a threesome; a ménage à trois. / (Cincinnati) A serving of Cincinnati chili with spaghetti and cheese.

Having three heads.

Having three prongs or similar parts; trifurcate.

The cardinal number occurring after two hundred ninety-nine and before three hundred one, represented in Arabic numerals as 300.

(of a person) Having three genetic parents; that is, having been produced by a process in which the nucleus of one egg is inserted into the cytoplasm of another egg, which contains mitochondrial DNA, and then the hybrid egg is fertilized by a sperm.

A car, cycle or motorbike having three wheels. / An autorickshaw, tuk-tuk, trishaw.

(electricity) Using three separate alternating currents of the same voltage at different phases.