What parts of speech is word sign?

The word "sign" can be several parts of speech, depending on its context:

* Noun: This is the most common usage, referring to a symbol, mark, or gesture that represents something else.

* Examples: "The store has a big sign outside." "She gave him a sign to be quiet."

* Verb: This usage means to make a signal or to make a gesture.

* Examples: "The dog signed with its tail." "He signed the contract."

* Adjective: In this case, "sign" means significant or important.

* Example: "This is a sign of the times."

To understand the part of speech, you need to consider the context in which the word is used.