American Heritage Dictionary
(6)
Century Dictionary
(9)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
Our meeting point for our excursion was in front of Carlos & Charlie's restaurant which we located first.— TravelPod.com Recent Updates
Saturday's 6 1 / 2-hour excursion was the second in three days for the crew of shuttle Discovery.
Inside the White House, the expectation was that the president's Latin American excursion would not be as much of a home run as his European economic summit.— CNN Political Ticker
Winter, after a feint, slunk into hiding again, and the only result of his excursion was a more splendid red on the maples, a more glowing russet on the oaks.— Jewel Weed

American Heritage Dictionary (1)
Century Dictionary (2)
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You can expect to see this word about twice a week.