1 journey, trip, excursion, outing, expedition, voyage, trek, peregrination, jaunt, junket:
We went on a guided tour because we were short of time and wanted to see everything.
2 stroll, perambulation, walkabout, ramble, walk, drive; round, circuit, ambit:
The government representatives are on a tour of all nuclear facilities.
3 spell, shift, assignment, turn, Military period of service or enlistment:
His tour of duty is not finished till midnight.
4 journey, travel, voyage, visit, trip, trek, sightsee, cruise; Colloq globe-trot:
On retirement we spent a year just touring around Europe.