Definition of "deal in"

deal in

verb
third-person singular simple present deals in, present participle dealing in, simple past and past participle dealt in
1. (transitive, card games, with in as adverbial particle) To deal cards to someone entering a game; to enter someone into a game by dealing cards to that person.
2. (transitive, with in as preposition) To trade (buy and sell) a named commodity.
3. (transitive) To accept (something or a piece of information) as a basis for a decision.
4. (transitive) To have an interest in something.