Is for a conjunction?

Yes, for can be used as a conjunction meaning “because” (e.g., “She wore her winter coat, for the wind was bitterly cold”).

However, the word “for” typically functions as a preposition (e.g., “She has lived here for ten years”) rather than a coordinating conjunction in modern English.

QuillBot’s free Grammar Checker will help you use the word “for” correctly in your writing.