a short trip or outing to some place, usually for a special purpose and with the intention of a prompt return: a pleasure excursion; a scientific excursion.
a trip on a train, ship, etc., at a reduced rate: weekend excursions to mountain resorts.
the group of persons making such a journey: an excursion of tourists.
a deviation or digression: excursions into futile philosophizing.
the displacement of a body or a point from a mean position or neutral value, as in an oscillation.
an accidental increase in the power level of a reactor, usually forcing its emergency shutdown.
the range of stroke of any moving part.
the stroke itself.
a sally or raid.
—v.i.
to go on or take an excursion.
—adj.
of, pertaining to, or intended for use on excursions: an excursion fare; an excursion bus.