instantly

Concise Oxford English Dictionary © 2008 Oxford University Press:
instant/ˈɪnstənt/

▶adjective

• 1 happening immediately.

  ■ (of food) processed to allow quick preparation.

• 2 dated urgent; pressing.

• 3 [postpos.] dated (in business letters) of the current month: your letter of the 6th instant.

• 4 archaic of the present.

▶noun

• 1 a precise moment of time.

• 2 a very short time.

– derivatives
instantly adverb.

– origin ME: via OFr. from L. instant-, instare ‘be at hand’, from in- ‘in, at’ + stare ‘to stand’.