Yet another example of a 'strong verb' past form. It is the past tense and past participle of misspell. Apart from dialectal preferences, it is equal in meaning to the form misspell in all ways.

British English shows a preference for retaining strong verb forms (burnt, learnt, spelt, dreamt, spoilt etc). American English shows a preference for ignora... I'm mean simplification (burned, learned etc).

Compare insure/ensure and inquiry/enquiry.
Most strong verbs' past tense is misspelt in American/British English.
by Dave December 31, 2003
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V. To spell a word incorrectly.
According to the Oxford American Heritage Dictionary, Herald colleges edition, both "misspelled" and "misspelt" are acceptible.
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A shibboleth that people that believe that the English language should be static use to find each other.

Kind of like a secret fraternity handshake.
Q: "What is the correct way to say a word is not spelled properly?"

A: "Oh god. You're one of those 'misspelt' dumbasses, aren't you? Shoo! The thumbs down button is up and to the right."
by Al Benedict August 17, 2011
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v. (past) to have spelt a word incorrectly.

part. (past) having been spelt incorrectly.

This is a rarely used but often preferred (among the pretentious, eclectic, geeky, artsy, or British) spelling of "misspelled."
I hate it when I read advertisements with misspelt words.
by Bad Grammar Must Die April 02, 2003
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The bad, ugly and otherwise deprecated spelling of "misspelled."
As a lamer, I can tell you it's spelled 'misspelt.'
by The Grammar Nazi March 19, 2001
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