1. (v. t.) To try or to ascertain by an experiment, or by a test or standard; to test; as, to prove the strength of gunpowder or of ordnance; to prove the contents of a vessel by a standard measure.

2. (v. t.) To evince, establish, or ascertain, as truth, reality, or fact, by argument, testimony, or other evidence.

3. (v. t.) To ascertain or establish the genuineness or validity of; to verify; as, to prove a will.

4. (v. t.) To gain experience of the good or evil of; to know by trial; to experience; to suffer.

5. (v. t.) To test, evince, ascertain, or verify, as the correctness of any operation or result; thus, in subtraction, if the difference between two numbers, added to the lesser number, makes a sum equal to the greater, the correctness of the subtraction is proved.

6. (v. t.) To take a trial impression of; to take a proof of; as, to prove a page.

7. (v. i.) To make trial; to essay.

8. (v. i.) To be found by experience, trial, or result; to turn out to be; as, a medicine proves salutary; the report proves false.

9. (v. i.) To succeed; to turn out as expected.

affirm afford proof of argue ascertain assay attend attest audit authenticate back back up balance balance the books be found bear out become of bespeak betoken bolster bring home to bring out bring to test buttress certify check check and doublecheck check out check over cinch circumstantiate clinch collate come about come of come out confirm corroborate cross-check cut and try demonstrate determine develop document double-check end engrave ensue essay establish eventuate evince examine experiment fall out fare fix follow follow from fortify get out give a try give a tryout have a case have a go hectograph hold good hold water impress imprint indicate inventory issue make good make out mimeograph multigraph nail down overhaul overprint pan out play around with practice upon print probate proof prove to be prove true publish pull pull a proof put out put to bed put to press put to trial ratify recheck reinforce reissue remove all doubt reprint research result road-test run run a sample run off sample set at rest settle settle the matter shake down show stamp strengthen strike substantiate support sustain take stock taste terminate test triple-check try try it on try out turn out undergird unfold uphold validate verify warrant work out