A period of darkness between sunset and sunrise.

A time for sleep or rest.

सोने का समय

English Usage: I usually watch movies at night.

Hindi Usage: मैं आमतौर पर रात में फिल्में देखता हूँ।

A person or group that keeps watch over an area for security or safety.

The act of keeping watch over an area.

निगरानी करना

English Usage: They went on a patrol to check for any suspicious activity.

Hindi Usage: उन्होंने किसी संदिग्ध गतिविधि की जांच करने के लिए निगरानी की।