—to listen to, watch, or consider something or someone very carefully.

—to be decided.

—to suddenly start to be successful and popular.

—to discover something, usually using special equipment.

—to use someone or something instead of another person or thing. 1. The definition is taken from the Macmillan Dictionary © Macmillan Education Limited 2. The definition is taken from the Oxford Advanced Learner's Dictionary © Oxford University Press 3. The definition is taken from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press 4. The definition is taken from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press 5. The definition is taken from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press