prove out

I just love to experiment, to work, and to prove out things, so that ranch life and "roughing it" just suit me.

The whole deal is being kept strictly under wraps until Leffingwell's experiments prove out.

Even if the third-stage motor never fired, the rocket was high enough to prove out the project objective.

The exact direction that this line takes will prove out in question.

If he asked, it must be to receive all and return nothing, except whatever of constancy time might prove out of his heart.