Definition of "hopping"

(Britain) hop picking, the practice of picking hops; for Londoners a holiday period working in the hop gardens of Kent.  examples

The addition of hops during the production of beer as a flavouring agent  examples

present participle and gerund of hop  examples

The act of one who, or that which, hops; a jumping, frisking, or dancing.  examples

(countable, physics) A shift from one energy-state to another by an electron in an atom.  examples

(US, slang) Of a location, crowded with people.