what does universal joint mean?

UNIVERSAL JOINT as NOUN

Meaning
- coupling that connects two rotating shafts allowing freedom of movement in all directions
Synonym(s)
- universal (what does universal mean?)
Usage Example(s)
- in motor vehicles a universal joint allows the driveshaft to move up and down as the vehicle passes over bumps
Hypernyms(s) universal joint is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- coupling (what does coupling mean?)
- coupler (what does coupler mean?)