instantaneousin‧stan‧ta‧ne‧ous /ˌɪnstənˈteɪniəs◂/ adjective - Death from a massive heart attack was almost instantaneous.
- Fortunately for him, his death was instantaneous.
happening or needing to be done immediately► immediate · My immediate reaction was shock and horror.· This letter requires your immediate attention.· The immediate needs of the refugees are for warm clothing and clean drinking water.· One immediate worry is money.
► instant happening immediately, without any delay or doubt: · The workers are being threatened with instant dismissal.take an instant dislike to somebody : · He took an instant dislike to LeRoy.
► instantaneous very nearly at the same time as something else happens, and often as a result of it: · Death from a massive heart attack was almost instantaneous.
ADVERB► almost· In the many cases where death is instantaneous or almost instantaneous, there will of course be no award for pain and suffering.· And the effect of this sudden, almost instantaneous blast of self-recognition?· At Eschede the almost instantaneous dissipation of kinetic energy was bound to cause massive damage.· Anyone searching the resultant database by means of a computer terminal has almost instantaneous access to every item in the newspaper.
nouninstanceinstantadjectiveinstantinstantaneousadverbinstantlyinstantaneously