Definition of idea
1
: a formulated thought or opinion
2
: whatever is known or supposed about something
a child's idea of time
3
: the central meaning or chief end of a particular action or situation
4a
: a plan for action : design
b
: a standard of perfection : ideal
c
: a transcendent entity that is a real pattern of which existing things are imperfect representations
5a
: an entity (such as a thought, concept, sensation, or image) actually or potentially present to consciousness
b
: an indefinite or unformed conception
c
obsolete
: an image recalled by memory
6
Christian Science
: an image in Mind
7
archaic
: a visible representation of a conception : a replica of a pattern
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Merriam-Webster unabridged
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Time Traveler for idea
The first known use of idea was in the 14th century
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