"tour" in the noun sense
1. tour, circuit
a journey or route all the way around a particular place or area
"they took an extended tour of Europe"
"we took a quick circuit of the park"
"a ten-day coach circuit of the island"
2. go, spell, tour, turn
a time period for working (after which you will be relieved by someone else
"it's my go"
"a spell of work"
3. enlistment, hitch, term of enlistment, tour of duty, duty tour, tour
a period of time spent in military service
"tour" in the verb sense
make a tour of a certain place
"We toured the Provence this summer"
Source: WordNet® (An amazing lexical database of English)
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