Definition of I have no idea
- "What time is it?" "I have no idea."
: the 9th letter of the English alphabet
: a graphic representation of this letter
: a speech counterpart of orthographic i
: someone aware of possessing a personal individuality : self
used as a connective vowel to join word elements especially of Latin origin
: a transcendent entity that is a real pattern of which existing things are imperfect representations
: a standard of perfection : ideal
: a plan for action : design
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