noun
A very brief, involuntary episode of sleep, often lasting a few seconds; commonly discussed in contexts of drowsy driving or sleep deprivation. The term マイクロスリープ is also used.
See also: マイクロスリープ
運転中に瞬眠が起こると非常に危険だ。
It is extremely dangerous if a microsleep occurs while driving.
徹夜明けで、会議中に何度か瞬眠してしまった。
After an all-nighter, I had several microsleeps during the meeting.