based (Adjective) — Having a base. ex. "firmly based ice"
based (Adjective) — Having a base of operations (often used as a combining form). ex. "a locally based business" ex. "an Atlanta-based company" ex. "carrier-based planes"
based (Verb) — Use as a basis for; found on. ex. "base a claim on some observation"
based (Verb) — Situate as a centre of operations. ex. "we will base this project in the new lab"
based (Verb) — Use (purified cocaine) by burning it and inhaling the fumes.