To rely, especially for support or maintenance: Children must depend on their parents. To place trust or confidence: You can depend on his honesty. See Synonyms at rely. To be determined, conditioned, or contingent: a grade depending on the results of the final exam. To have a dependence: began to depend more and more on drugs. To be pending or undecided, as in a court or legislature. To hang down: "And ever-living Lamps depend in Rows\u201d ( Alexander Pope).