instantaneously
adv. C1 Advanced US //ˌɪnstənˈtæniəsɫi// UK //ˌɪnstɑːntˈeɪniəsli// in·stan·ta·neous·ly
adv. happening or happening at the same time as something else. It describes something that happens so fast that you cannot see it take place.
adv. occurring or happening at the same time as another event; without any delay. Often used to describe physical or mechanical responses that are immediate.
The light turned on instantaneously when I flipped the switch.
The computer processes the data instantaneously, allowing the user to see the results of their calculations in real time.
In physics, the theory suggests that information can travel instantaneously across vast distances, though this remains a subject of intense debate among modern researchers.
From instantaneous + -ly.