Meaning & Definition of word "Signal"

Signal

/ˈsɪɡnəl/

1. A gesture, action, or sound that is used to convey information or instructions.
- Example: He raised his hand as a signal for the meeting to start.
2. A physical quantity whose value can change to convey information.
- Example: The radio station broadcasts a signal that can be picked up by any compatible radio.
3. A sign or indication of something.
- Example: The darkening sky was a signal that a storm was approaching.

1. To communicate or indicate something through a gesture, action, or sound.
- Example: She signaled to him to come over.
2. To send or transmit a message or communication, especially by electronic means.
- Example: The device can signal the operator if there is a malfunction.

●Middle English, from Latin 'signalis', from 'signum' meaning 'sign'.

signal to noise ratio:

A measure used to compare the level of a desired signal to the level of background noise.

signal for help:

A gesture or action indicating that assistance is needed.

send a clear signal:

To communicate something in an unmistakable way.

sign:

A mark or indication.

indicator:

Something that provides information.

communication:

The act of conveying information.

Meaning: A sign of approval or agreement.

● Example Sentence: He gave me the signal to go ahead with the plan.

Meaning: A way to express interest or intention.

● Example Sentence: She sent out a signal that she wanted to hang out.