Merriam-Webster's Collegiate® Dictionary, 11th Edition
HOP
I. verb (hopped; hopping)
Etymology: Middle English hoppen, from Old English hoppian Date: before 12th century intransitive verb to move by a quick springy leap or in a series of leaps, to make a quick trip especially by air, to set about doing something, transitive verb to jump over , to ride on ,
II. noun
Date: 1508
1. a short brisk leap especially on one leg, bounce , rebound , dance 3,
3. a flight in an aircraft, a short trip,
III. noun
Etymology: Middle English hoppe, from Middle Dutch; akin to Old High German hopfo hop
Date: 15th century
the ripe dried pistillate catkins of a perennial north-temperate zone twining vine ( Humulus lupulus ) of the hemp family used especially to impart a bitter flavor to malt liquors, the vine from which hops is obtained having 3- to 5-lobed leaves and inconspicuous flowers of which the pistillate ones are in glandular cone-shaped catkins,
IV. transitive verb (hopped; hopping)
Date: 1572
to flavor with hops