Quad

1A quadrangle.

‘students greeted him as he walked through the quad’

2A quadruplet.

‘9,294 women gave birth to twins, while 147 had triplets, and five had quads’

3A quadriceps muscle.

‘I have well-developed quads but my glutes are not all they could be’

4A quad bike.

‘inexperienced riders on quads and mopeds’

5Quadraphonic sound.

‘we issued records in two forms at once, stereo and quad’

‘This means that a quadraphony transmission must be capable of reproduction through a stereo or monaural receiver.’

6(in telephony) a group of four insulated conductors twisted together, usually forming two circuits.

‘These units can contain one, two or eight LEDs, the duals and quads available in tower versions only.’

7A radio antenna in the form of a square or rectangle broken in the middle of one side.

‘The monthly electric bill to run a high-speed quad can hit $14,000.’

marketplace, close, quadrangle, quad, courtyard

8informal A traditional roller skate.

‘I have been skating on Ice, roller, quads, blades for over 20 years.’
‘Even then, quads aren't as fast as low cut inline speed skates.’
‘I'm sure the people kept wondering, ‘Why struggle with those blades when the quads are so much better?’’

9Printing
A small metal block in various sizes, lower than type height, used in letterpress printing for filling up short lines.

Definition of quad in English: