a source of illumination, typically an electric lamp or a lantern, the brightness of a room or building, traffic lights or signal lights used to control traffic

Christmas lights, stage lights, tail lights

Formal and Informal Expressions of lights

In different contexts, you can replace 'lights' with suitable alternatives. In a more formal setting, 'illuminators' is apt. In informal speech or writing, 'lamps, lanterns' is a commonplace synonym.

lights: Explore its Definition & Usage

lights Definition

1a source of illumination, typically an electric lamp or a lantern
2the brightness of a room or building
3traffic lights or signal lights used to control traffic

Using lights: Examples

Take a moment to familiarize yourself with how "lights" can be used in various situations through the following examples!

Example
The lights in the room were too bright.
Example
The city lights were beautiful at night.
Example
The traffic lights turned red.
Example
The stage lights were blinding.

lights Synonyms and Antonyms

Synonyms for lights

lamps
illumination
brightness
lanterns
signal lights

Phrases with lights

Christmas lights
decorative lights used during the Christmas season
Example
We put up Christmas lights on our house every year.
stage lights
lights used to illuminate a stage during a performance
Example
The stage lights were so bright that I couldn't see the audience.
tail lights
red lights on the back of a vehicle that indicate when the brakes are being applied
Example
I saw his tail lights turn on as he slowed down for the stop sign.

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Summary: lights in Brief

The term 'lights' [laɪts] refers to sources of illumination, such as lamps or lanterns, and the brightness of a room or building. It also includes traffic lights or signal lights used to control traffic. Examples include 'The lights in the room were too bright,' and 'The traffic lights turned red.' Phrases like 'Christmas lights' and 'stage lights' denote specific types of lights.