excursion

Short definition from Wiktionary

Noun

1. 1
   A brief recreational trip; a journey out of the usual way.
2. 2
   A field trip.
3. 3
   A wandering from the main subject: a digression.
4. 4
   An occurrence where an aircraft runs off the end or side of a runway or taxiway, usually during takeoff, landing, or taxi.
5. 5
   A deviation in pitch, for example in the syllables of enthusiastic speech.

Verb

1. 1
   To go on a recreational trip or excursion.