in·stan·ta·neous 
/ˌɪnstənˈteɪnijəs/ adjective
/ˌɪnstənˈteɪnijəs/ adjective : happening very quickly : happening in an instant
▪ We got an almost instantaneous response from the company. ▪ Their deaths were instantaneous.
▪ We got an almost instantaneous response from the company. ▪ Their deaths were instantaneous.
— in·stan·ta·neous·ly adverb
▪ They died instantaneously.
▪ They died instantaneously.
