Diccionario nuevo y completo de las lenguas española è inglesa, inglesa y española
Estructura completa
To sleep with one's eyes open
Variantes
to sleep with one[‘s] eye[s] [open, peeled]
Contexto
Have you heard the saying about “sleeping with one eye open”? It’s a bit of metaphoric advice about staying vigilant—and a way to describe very light restless sleep.
But sleeping with eyes open is more than a metaphor. It’s an actual sleep condition—known as nocturnal lagophthalmos—and it is more common than you might think.