excursion 1

Concise Oxford English Dictionary © 2008 Oxford University Press:
excursion/ɪkˈskɜːʃn/

▶noun

• 1 a short journey, especially one taken for leisure.

• 2 a deviation from a regular activity or course: the firm's disastrous excursion into the US electrical market.
  ■ technical a movement along a path or through an angle.

– derivatives
excursionist noun.

– origin C16: from L. excursio(n-), from excurrere ‘run out’.