Definition of "bob"

bob¹

/bɒb/

verb
third-person singular simple present bobs, present participle bobbing, simple past and past participle bobbed
1. (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.
2. (transitive) To move (something) as though it were bobbing in water.
3. To curtsy.
4. To strike with a quick, light blow; to tap.
  Quotations
  He was suddenly bobbed on the face by the servants.
  1533, Thomas Elyot, The Book of the Governor
  Lo, lo, lo, lo, what modicums of wit he vtters, his euaſions haue ears thus long. I haue bobed his braine more then he has beate my bones.
  c. 1602 (date written), William Shakespeare, The Famous Historie of Troylus and Cresseid. […] (First Quarto), London: […] G[eorge] Eld for R[ichard] Bonian and H[enry] Walley, […], published 1609, [Act II, scene i]
5. (intransitive) Synonym of blob (“catch eels using worms strung on thread”)
  Quotations
  After they had had supper Frank said, Do you remember those men whom we saw near Norwich, who sat in small boats all the night long, and with a line in each hand, bobbed for eels?
  1876, George Christopher Davies, The Swan and Her Crew, page 134
noun
plural bobs
1. A bobbing motion; a quick up and down movement.
2. A curtsy.
3. A bobber (buoyant fishing device).
  Quotations
  Or yellow bobs turn'd up before the plough / Are chiefest baits, with cork and lead enough.
  1613, John Dennys, The Secrets of Angling
4. Any of various hesperiid butterflies.

bob²

/bɒb/

noun
plural bobs
1. A bob haircut.
2. Any round object attached loosely to a flexible line, a rod, a body part etc., so that it may swing when hanging from it.
  Quotations
  Ecod! I have got them. Here they are. My cousin Con's necklaces, bobs and all.
  1773, Oliver Goldsmith, She Stoops to Conquer
3. The dangling mass of a pendulum or plumb line.
4. The docked tail of a horse.
5. A short line ending a stanza of a poem.
6. The short runner of a sled.
7. A bobsleigh.
8. A small wheel, made of leather, with rounded edges, used in polishing spoons, etc.
9. A working beam in a steam engine.
10. A particular style of ringing changes on bells.
11. A blow; a shake or jog; a rap, as with the fist.
12. (obsolete) A knot or short curl of hair; also, a bob wig.
  Quotations
  A plain brown bob he wore.
  1737, William Shenstone, The Extent of Cookery
13. (obsolete) The refrain of a song.
  Quotations
  To Bed, to Bed, will be the Bob of the Song.
  1692, Roger L’Estrange, “ (please specify the fable number.) (please specify the name of the fable.)”, in Fables, of Æsop and Other Eminent Mythologists: […], London: […] R[ichard] Sare, […]
14. (obsolete) A jeer; a sharp jest or taunt.
  Quotations
  He that a fool doth very wisely hit, Doth very foolishly, although he smart, Not to seem senseless of the bob.
  c. 1598–1600 (date written), William Shakespeare, “As You Like It”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene vii], lines 53-55
verb
third-person singular simple present bobs, present participle bobbing, simple past and past participle bobbed
1. (transitive) To cut (hair) into a bob haircut.
2. (transitive) To shorten by cutting; to dock; to crop.
3. To bobsleigh.

bob³

/bɒb/

noun
plural bob
1. (Kenya, slang; UK and Australia, historical, dated) A shilling.
  Quotations
  One of the bottlenosed fraternity it was went by the name of James Wought alias Saphiro alias Spark and Spiro, put an ad in the papers saying he'd give a passage to Canada for twenty bob.
  1922 February, James Joyce, “[Episode 12: The Cyclops]”, in Ulysses, Paris: Shakespeare and Company, […]
  “’Ere y'are, the best rig-out you ever ’ad. A tosheroon [half a crown][sic] for the coat, two ’ogs for the trousers, one and a tanner for the boots, and a ’og for the cap and scarf. That's seven bob.”
  1933 January 9, George Orwell [pseudonym; Eric Arthur Blair], chapter XXIX, in Down and Out in Paris and London, London: Victor Gollancz […], pages 214–215
  […] there was a sound of barking and a great hefty dog of the Hound of the Baskervilles type came galloping at me, obviously intent on mayhem, [... and] I was just commending my soul to God and thinking that this was where my new flannel trousers got about thirty bobs' worth of value bitten out of them […]
  1960, P. G. Wodehouse, chapter XVII, in Jeeves in the Offing
2. (Australia, dated slang) A 10-cent coin.
3. (slang) An unspecified amount of money.

bob⁴

/bɒb/

noun
plural bobs
1. Abbreviation of shishkabob.

bob⁵

/bɒb/

noun
plural bobs
1. (computer graphics, demoscene) A graphical element, resembling a hardware sprite, that can be blitted around the screen in large numbers.
  Quotations
  The bob list determines the drawing priority […]
  1986, Eugene P Mortimore, Amiga programmer's handbook, Volumes 1-2
  IMHO, youd [sic] be better doing other things with the CPU and letting the blitter draw bobs, esp on a machine with fast ram.
  1995, John Girvin, “Blitting bobs”, in comp.sys.amiga.programmer (Usenet)
  Changes: This release adds 2 new effects (bobs and unlimited bobs), has a GFX directory for sharing graphics, adds utility functions to the common code
  2002, demoeffects, “Demotized 0.0.1 - A collection of demo effects from the early days of the demo scene.”, in fm.announce (Usenet)

Definition of "bob"

bob1

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bob2

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bob3

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bob4

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bob5

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bob¹

bob²

bob³

bob⁴

bob⁵