* Noun: This is the most common usage, referring to a limitation or constraint.
* Example: "There are restrictions on the amount of luggage you can bring."
* Verb: It can be used as a verb meaning "to limit or confine."
* Example: "The new policy restricts the use of personal devices."
* Adjective: While less common, it can be used as an adjective meaning "limited or confined."
* Example: "The restriction diet was difficult to follow."
To determine the part of speech, look at its function in the sentence.