prop¹ /prop/

1. A rigid support
2. A supplementary support
3. A stay
4. A strut
5. A timber supporting a mine roof
6. A supporter or upholder
7. A leg (slang)
8. A boxer's extended arm (slang)
9. Either of the two forwards at the ends of the front row of the scrum (also prop forward; rugby)
10. An act of propping in a horse (horse-racing, orig Aust)

1. To hold up by means of something placed under or against (often with up)
2. To support or sustain (often with up)
3. To keep (a failing enterprise, etc) going (often with up)
4. To hit straight or knock down (slang)

(of a horse) to stop suddenly

proppˈant noun (mining)

A material, eg sand, used to keep open fissures in an oil-bearing sediment (see also fracking)

prop forward see n above.

propˈ-root noun

A root growing down from a trunk or branch, serving to prop up a tree

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