c.1320, "a turn, a shift on duty," from O.Fr.
tour, tourn "a turn, trick, round, circuit, circumference," from
torner, tourner "to turn," from L.
tornare "to polish, round off, fashion, turn on a lathe" (see
turn). Sense of "a traveling around, journey" is first recorded 1643. The verb is attested from 1746.
Tourist is first attested 1780;
tourist trap attested from 1939 in Graham Greene;
tourism is from 1811.
Tour de force "feat of strength" is 1802, from Fr., from
force "strength."
Tour de France is recorded from 1922.
The Grand Tour, a journey through France, Germany, Switzerland, and Italy formerly was the finishing touch in the education of a gentleman.