establish the validity of something, as by an example, explanation or experiment; "The experiment demonstrated the instability of the compound"; "The mathematician showed the validity of the conjecture"
prove formally; demonstrate by a mathematical, formal proof
obtain probate of; "prove a will"
take a trial impression of
be shown or be found to be; "She proved to be right"; "The medicine turned out to save her life"; "She turned up HIV positive"
moving from one place to another and back again; "he traveled back and forth between Los Angeles and New York"; "the treetops whipped to and fro in a frightening manner"; "the old man just sat on the porch and rocked back and forth all day"
(military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat; "the disorderly retreat of French troops"
(military) a bugle call signaling the lowering of the flag at sunset
(military) a signal to begin a withdrawal from a dangerous position
a place of privacy; a place affording peace and quiet
make a retreat from an earlier commitment or activity; "We'll have to crawfish out from meeting with him"; "He backed out of his earlier promise"; "The aggressive investment company pulled in its horns"
move away, as for privacy; "The Pope retreats to Castelgondolfo every summer"