hop

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A twining vine (Humulus lupulus) having lobed leaves and green female flowers arranged in conelike spikes.
• noun The dried female inflorescences of this plant, containing a bitter aromatic oil. They are used in brewing to inhibit bacterial growth and to add the characteristic bitter taste to beer.
• noun Slang Opium.
• transitive verb To flavor with hops.
• intransitive verb To move with light bounding skips or leaps.
• intransitive verb Informal To move quickly or be busily active.
• intransitive verb To jump on one foot or with both feet at the same time.
• intransitive verb To make a quick trip, especially in an airplane.
• intransitive verb To travel or move often from place to place. Often used in combination.
• intransitive verb To move over by hopping.
• intransitive verb Informal To get on (a train) surreptitiously in order to ride without paying a fare.
• noun A light springy jump or leap, especially on one foot or with both feet at the same time.
• noun A rebound.
• noun Informal A dance or dance party.
• noun A short distance.
• noun A short trip, especially by air.
• noun A free ride; a lift.
• idiom (hop, skip, and (a) jump) A short distance.
• idiom (hop to it) To begin an activity or a task quickly and energetically.

from The Century Dictionary.

• To leap, or move by successive leaps or sudden starts; skip, as birds; frisk or dance about; spring; specifically, as applied to persons, to spring or leap with one foot.
• To limp; halt; walk lame.
• To dance.
• Synonyms Leap, Trip, etc. See skip.
• To jump over.
• In cutting rasps, to carry (the punch) with a skipping movement the required distance between the teeth: as, to hop the punch.
• To die.
• Synonyms See skip, v. i.
• noun A leap, especially on one foot; a light spring.
• noun A dance; a dancing-party.
• To treat with hops: as, to hop ale.
• To pick or gather hops.
• noun A plant, Humulus Lupulus, of the natural order Urticaceœ, with long twining stems and abundant 3- to 5-lobed leaves.
• noun plural The flowers of this plant, as used in brewing, medicine, etc.
• noun Wood fit for hop-poles.
• noun In Tasmania, a leguminous shrub, Daviesia latifolia. Also called bitter-leaf.
• noun Same as native hop .

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To move by successive leaps, as toads do; to spring or jump on one foot; to skip, as birds do.
• intransitive verb To walk lame; to limp; to halt.
• intransitive verb To dance.
• transitive verb To impregnate with hops.
• intransitive verb To gather hops. [Perhaps only in the form hopping, vb. n.]
• noun (Bot.) A climbing plant (Humulus Lupulus), having a long, twining, annual stalk. It is cultivated for its fruit (hops).
• noun The catkin or strobilaceous fruit of the hop, much used in brewing to give a bitter taste.
• noun The fruit of the dog-rose. See Hip.
• noun (Brewing) See under 1st Back.