Definition of "dizzy"

Alas! his brain was dizzy.

1627, Michaell Drayton [i.e., Michael Drayton], “Nimphidia. The Court of Fayrie.”, in The Battaile of Agincourt. […], London: […] A[ugustine] M[atthews] for VVilliam Lee, […], published 1631

To climb from the brink of Fleet Ditch by a dizzy ladder.

1856 February, [Thomas Babington] Macaulay, “Oliver Goldsmith ”, in T[homas] F[lower] E[llis], editor, The Miscellaneous Writings and Speeches of Lord Macaulay, new edition, London: Longman, Green, Reader, & Dyer, published 1871

...faintly from the valley far below came an unmistakable sound which brought me to my feet, trembling with excitement, to peer eagerly downward from my dizzy ledge.

1918 September–November, Edgar Rice Burroughs, “The Land That Time Forgot”, in The Blue Book Magazine, Chicago, Ill.: Story-press Corp.; republished as chapter IX, in Hugo Gernsback, editor, Amazing Stories, (please specify |part=I, II, or III), New York, N.Y.: Experimenter Publishing, 1927,

the dizzy multitude

1671, John Milton, “The Second Book”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: […] J. M[acock] for John Starkey […]

Them as diz ’at is dizzy.Those who do that are half-witted.

1952 Albert Lyon Hoy, An Etymologal Glossary of the East Yorkshire Dialect

Let me have this violence and compulsion removed, there is nothing that, in my seeming, doth more bastardise and dizzie a wel-borne and gentle nature […]

1603, Michel de Montaigne, translated by John Florio, The Essayes […], London: […] Val[entine] Simmes for Edward Blount […]

If the jangling of thy bells had not dizzied thy understanding.

1820, Walter Scott, Ivanhoe; a Romance. […], volumes (please specify |volume=I to III), Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co. […]

So ramshackle was the locals' attempt at defence that, with energetic wingers pouring into the space behind panicked full-backs and centre-halves dizzied by England's movement, it was cruel to behold at times. The contest did not extend beyond the half-hour mark.

2012 September 7, Dominic Fifield, “England start World Cup campaign with five-goal romp against Moldova”, in The Guardian

A service exchange distributor usually needs to be ordered by a motor factor and cost £150-200! I would suggest you use the SD1 dizzy body/cap etc but change the trigger mechanism to a modern electronic/breakerless unit such as the Newtronic unit.

2005, Roger Williams, How to Give Your MGB V8 Power, page 201