Definitions

1. noun

a king or monarch, especially an ancient Roman king

“The gladiator was declared rex of the arena by the crowd.”

2. noun

a male goldfinch

“A pair of rexs perched on the bird feeder in the backyard.”

3. noun

the upper or crowning part of the skull

“The neurosurgeon carefully examined the patient’s rex in the MRI scan.”

4. noun

a fossilized dinosaur footprint or track

“The paleontologist carefully examined the rex in the sandstone formation.”