- The definition of an idea is a thought, belief, opinion or plan.
An example of idea is a chef coming up with a new menu item.
idea definition by Webster's New World
- something one thinks, knows, or imagines; a thought; mental conception or image; notion
- an opinion or belief
- a plan; scheme; project; intention; aim
- a hazy perception; vague impression; fanciful notion; inkling
- meaning or significance
- Music a theme or figure
- Philos. according to Plato, any of the unchanging, eternal, intelligible models or archetypes of which all material things are only imperfect imitations and from which their existence derives: in modern philosophy, used variously to mean the immediate object of thought, absolute truth, etc.
Origin: Classical Latin ; from Classical Greek form or appearance of a thing as opposed to its reality ; from Indo-European an unverified form widswo- ; from base an unverified form weid-, to see, know from source Classical Latin videre, to see, Classical Greek idein, to see, Old English witan, to know
idea definition by American Heritage Dictionary
- Something, such as a thought or conception, that potentially or actually exists in the mind as a product of mental activity.
- An opinion, conviction, or principle: has some strange political ideas.
- A plan, scheme, or method.
- The gist of a specific situation; significance: The idea is to finish the project under budget.
- A notion; a fancy.
- Music A theme or motif.
- Philosophy a. In the philosophy of Plato, an archetype of which a corresponding being in phenomenal reality is an imperfect replica.b. In the philosophy of Kant, a concept of reason that is transcendent but nonempirical.c. In the philosophy of Hegel, absolute truth; the complete and ultimate product of reason.
- Obsolete A mental image of something remembered.
Origin: Middle English, from Latin, from Greek; see weid- in Indo-European roots.
- i·deˈa·less adjective
idea - Computer Definition
(International Data Encryption Algorithm) A secret key cryptography method that uses a 128-bit key. Introduced in 1992, its European patent is held by Ascom-Tech AG, Solothurn, Switzerland. Written by Xuejia Lai and James Massey, it uses the block cipher method that breaks the text into 64-bit blocks before encrypting them. See PGP.
idea - Medical Definition