night-n; 6 Senses

Sense Number 1: the dark portion of the diurnal cycle of a 24-hour day

Commentary: NIGHT[+portion][+cycle][+time][+diurnal][-sunlight]

That hotel costs $200 a night during the high season.
If you pay for four nights at this hotel you get the fifth night free.
Lions usually hunt at night.
They will play the Yankees in a night game.
We sat on the hillside and watched falling stars on a warm summer night.
The package includes five days and four nights in Acapulco.
They lock the front gate every night.
It's always night somewhere on the earth.

WordNet 3.0 Sense Numbers: 1, 7, 3, 4

Sense Number 2: a state or period of regular sleep

Commentary: NIGHT[+state][+sleep][+habitual]

John had a lot of short nights working on his dissertation.
They spent a restless night in the hot, humid hotel room.
She wished the children a good night as she tucked them into bed.
The man was delirious after three sleepless nights.

WordNet 3.0 Sense Numbers: 3

Sense Number 3: the quality of darkness, diminished visibility

Commentary: NIGHT[+quality][+visibility][+diminished]
NOTE: focus is on the quality of darkness rather than a stretch of time.

The night hid her face from him, but he could hear her voice.
We watched the lights of the ship recede into the night.
The commandos snuck into the town under the cover of night.

WordNet 3.0 Sense Numbers: 5

Sense Number 4: the transition from day to night, nightfall

Commentary: NIGHT[+state][+transition][-daytime]
NOTE: focus is on the boundary between the end of day and the beginning point of night.

As night fell, the shadows grew long and birds nested in the trees.
We managed to reach the cabin just before night.

WordNet 3.0 Sense Numbers: 6

Sense Number 5: a deteriorated social state

Commentary: NIGHT[+state][+social][+deteriorated]

Night fell over Europe as the Nazis invaded Poland and France.
The long night of the Middle Ages ended with the stirrings of the Renaissance.

WordNet 3.0 Sense Numbers: 2

Sense Number 6: a social event or occasion, usually festive

Commentary: NIGHT[+event][+social][+occasion][+festive]

Mary has organized a girls' night out this evening.
Will you be attending opening night of the Met?
This is an evening gown to wear on your big nights.
John and Bill had quite a night on the town.
There isn't much night life on Main Street these days.

WordNet 0.0 Sense Numbers: 2