Definitions from Wiktionary ( )

▸ verb:  (intransitive) To move gently and vertically, in either a single motion or repeatedly up and down, at or near the surface of a body of water, or similar medium.
▸ verb:  (transitive) To move (something) as though it were bobbing in water.
▸ verb:  To curtsy.
▸ verb:  To strike with a quick, light blow; to tap.
▸ verb:  (intransitive) Synonym of blob (“catch eels using worms strung on thread”)
▸ noun:  A bobbing motion; a quick up and down movement.
▸ noun:  A curtsy.
▸ noun:  A bobber (buoyant fishing device).
▸ noun:  Any of various hesperiid butterflies.
▸ noun:  A bob haircut.
▸ noun:  Any round object attached loosely to a flexible line, a rod, a body part etc., so that it may swing when hanging from it.
▸ noun:  The dangling mass of a pendulum or plumb line.
▸ noun:  The docked tail of a horse.
▸ noun:  A short line ending a stanza of a poem.
▸ noun:  The short runner of a sled.
▸ noun:  A bobsleigh.
▸ noun:  A small wheel, made of leather, with rounded edges, used in polishing spoons, etc.
▸ noun:  A working beam in a steam engine.
▸ noun:  A particular style of ringing changes on bells.
▸ noun:  A blow; a shake or jog; a rap, as with the fist.
▸ noun:  (obsolete) A knot or short curl of hair; also, a bob wig.
▸ noun:  (obsolete) The refrain of a song.
▸ noun:  (obsolete) A jeer; a sharp jest or taunt.
▸ verb:  (transitive) To cut (hair) into a bob haircut.
▸ verb:  (transitive) To shorten by cutting; to dock; to crop.
▸ verb:  To bobsleigh.
▸ noun:  (Kenya, slang; UK and Australia, historical, dated) A shilling.
▸ noun:  (Australia, dated slang) A 10-cent coin.
▸ noun:  (slang) An unspecified amount of money.
▸ noun:  (computer graphics, demoscene) A graphical element, resembling a hardware sprite, that can be blitted around the screen in large numbers.
▸ noun:  (humorous) Vibrator (device designed to stimulate a woman's genitals).
▸ adjective:  (philately) Back-of-the-book; denoting those stamps in a catalogue that are not used for the payment of regular postage fees, and are displayed separately in the catalogue after that listing; the division between these two groups varies with the publisher.
▸ noun:  A diminutive of the male given name Robert.
▸ noun:  (cryptography, physics) The person or system receiving a message or signal from a source conventionally known as Alice.
▸ noun:  A generic male person.
▸ noun:  Abbreviation of shishkabob.
▸ noun:  Acronym of bur oak blight (“a fungal disease of plants”). [A disease of the bur oak (Quercus macrocarpa) caused by a Tubakia fungus.]

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