* Noun: A spiral or circular arrangement of something, like a coil of rope or a coil of wire.
* Example: "The electrician used a coil of copper wire."
* Verb: To wind or twist into a spiral or circular shape.
* Example: "She coiled the rope neatly around the post."
* Adjective: In some cases, "coil" can be an adjective meaning "spiral-shaped." However, this usage is less common.
* Example: "A coil spring was used to keep the door open."
To determine the part of speech, consider the context of the sentence.