stays up

Remains awake late

Stays up means to remain awake past one's usual bedtime or later than expected.

The kids begged to stay up for the fireworks.

It also describes something that maintains an elevated or upright position rather than falling or collapsing: These pants won't stay up without a belt.

A website or service that stays up remains operational and accessible.

The server stayed up through the whole traffic spike.

Related

wide awake · night owl · coffee · energy drink · insomnia · cramming · overnighter · eyelids · red eyes · yawn · nocturnal · keeps watch · vigilance · alert · restless · desk · propped · holds up

Opposites
wakefulness/consciousness

stays upgoes to sleep

Becomes unconscious for rest

goes to bed · turns in · falls asleep · retires · hits the hay

vertical position/structural integrity

stays upfalls down

Collapses to ground

collapses · falls over · topples · comes down · drops

persistence/maintenance of level

stays upgoes down

Moves to lower position

drops · falls · declines · plummets · dips

Family

stay, uproar, update, stays, upbeat, staying, uphold, upstairs, stayed

Familiarity
Top 20,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G