instantaneous
immediate / instant / momentary
Adjective
This term describes an event that happens with zero perceptible lag, creating a sense of absolute immediacy. It is frequently used in technical, scientific, or digital contexts to describe reactions or data transfers that occur faster than human perception can register. In a mathematical or physical sense, it refers to a specific snapshot in time. This distinguishes a measurement taken at one precise moment from an average taken over a duration, emphasizing a singular point of existence rather than a process.
Meanings
Adjective
Occurring or done in an instant or immediately without any perceptible delay.
"The reaction was instantaneous, with the light flashing the moment the button was pressed."