Main Entry: ex·cur·sion

Pronunciation: \ik-ˈskər-zhən\

Function: noun

Etymology: Latin excursion-, excursio, from excurrere

Date: circa 1587

1 a : a going out or forth : expedition b (1) : a usually brief pleasure trip (2) : a trip at special reduced rates
2 : deviation from a direct, definite, or proper course; especially : digression <needless excursions into abstruse theory>
3 : a movement outward and back or from a mean position or axis; also : the distance traversed : amplitude <the excursion of a piston>