adv ·Uncommon ·Advanced level

Definitions

Adverb

1. 1
   immediately; instantly; without delay. not-comparable

   ""They're another reason why I've got to get my girl and start instanter."

Synonyms

All synonyms

apaceat onceat the minuteawaydirectlyexpeditiously

Example

More examples

""They're another reason why I've got to get my girl and start instanter."

Etymology

Unadapted borrowing from Medieval Latin īnstanter (“immediately”), originally “vehemently” in Classical Latin.

Related phrases

this instant

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.