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Related to side with: blind side, Side lighting
side with someone
to join with someone; to take someone else's part; to be on someone's side. Why is it that you always side with him when he and I argue? I never side with anybody. I form my own opinions.
side with somebody
to agree with or support someone take somebody's side When workers have sued companies for violating their privacy, judges have usually sided with the employer.Related vocabulary: take sides
Usage notes: the opposite meaning is expressed by side against someone (to disagree with or not support someone): As much as I hate to side against a friend, I feel she is wrong.
Support or favor, as in The Armenians traditionally side with the Greeks against the Turks. This idiom was first recorded in 1600. For the antonym, see side against.
To align oneself with someone or something in a disagreement: The stalemate ended when a small group of senators sided with the opposing party.