Definition: a journey or route all the way around a particular place or area
Usage: they took an extended tour of Europe; we took a quick circuit of the park; a ten-day coach circuit of the island
Main entry: spell, go, tour, turn
Definition: a time for working (after which you will be relieved by someone else)
Usage: it's my go; a spell of work
Main entry: hitch, duty tour, enlistment, term of enlistment, tour, tour of duty
Definition: a period of time spent in military service
Main entry: tour
Definition: make a tour of a certain place
Usage: We toured the Provence this summer