late 13c., "a sepulchre," from Old French monument "grave, tomb, monument," and directly from Latin monumentum "a monument, memorial structure, statue; votive offering; tomb; memorial record," literally "something that reminds," a derivative of monere "to remind, bring to (one's) recollection, tell (of)," from PIE *moneie- "to make think of, remind," suffixed (causative) form of root *men- (1) "to think." Meaning "any enduring evidence or example" is from 1520s; sense of "structure or edifice to commemorate a notable person, action, period, or event" is attested from c. 1600.