overnight

Concise Oxford English Dictionary © 2008 Oxford University Press:
overnight/əʊvəˈnʌɪt/

▶adverb

• 1 for the duration of a night.

  ■ during the course of a night.

• 2 suddenly.

▶adjective

• 1 for use overnight.

  ■ done or happening overnight.

• 2 sudden.

▶verb stay overnight.

■ N. Amer. convey (goods) overnight.

▶noun a stop or stay lasting one night.