Synonym: fancy, notion, opinion, plan, thought. Similar words: side by side, death, deal out, dealer, deadly, deal in, deal with, a big deal. Meaning: [aɪ'dɪə] 
n. 1. the content of cognition; the main thing you are thinking about 2. a personal view 3. an approximate calculation of quantity or degree or worth 4. your intention; what you intend to do 5. (music) melodic subject of a musical composition.
n. 1. the content of cognition; the main thing you are thinking about 2. a personal view 3. an approximate calculation of quantity or degree or worth 4. your intention; what you intend to do 5. (music) melodic subject of a musical composition. 
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1 A powerful idea commissions some of its strength to him who challenges it. 
2 The man with a new idea is a crank until the idea succeeds.
3 The idea originated from the chairman.
4 It was he who first suggested the idea.
5 What did you think about the idea?
6 Flying a plane is wonderful,(www.Sentencedict.com) you have no idea.
7 Knit the brows and you'll have an idea.
8 Are you saying that it's a bad idea?
9 The surprise party was Jane's idea.
10 I was obliged to abandon that idea.
11 The President fastened on the idea at once.
12 His imagination played round that queer idea.
13 We all fell about at her idea.
14 How did Wilson react to your idea?
15 Personally[sentencedict.com], I don't think much of the idea.
16 Most local people support the idea of traffic-free streets.
17 The idea of eating raw shellfish nauseates me.
18 Sounds like a good idea to me.
19 We are totally supportive of this idea.
20 He dallied with the idea of becoming an actor.
21 Your idea will be incorporated in the plan.
22 I don't have any idea what's going on.
23 A good idea without action is worth nothing.
24 The idea of heaven presupposes the existence of God.
25 The whole idea is completely cock-eyed.
26 I find the idea totally abhorrent.
27 The advantage of the idea was its simplicity.
28 I think that's a very sensible idea.
29 He toyed with the idea of going to China.
30 It was Glen's idea, not mine.