instantaneous
Word family (noun) instance instant (adjective) instant instantaneous (adverb) instantly instantaneously
From Longman Dictionary of Contemporary Englishinstantaneousin‧stan‧ta‧ne‧ous /ˌɪnstənˈteɪniəs◂/ adjective IMMEDIATELYhappening immediately modern methods of instantaneous communication —instantaneously adverbExamples from the Corpusinstantaneous• Death from a massive heart attack was almost instantaneous.• Fortunately for him, his death was instantaneous.