think, conceive, imagine, fancy, realize, envisage, envision mean to form an idea of. think implies the entrance of an idea into one's mind with or without deliberate consideration or reflection.

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THINK definition: 1. to believe something or have an opinion or idea: 2. to have a low opinion of someone or…. Learn more.

The terms "thought" and "thinking" are used in different ways in psychology and philosophy. [1][2][3] In their most common sense, they refer to conscious processes that occur …

To weigh something carefully: I'd think twice before spending all that money on clothes. [Middle English thenken, from Old English thencan; see tong- in Indo-European roots.]

If you say that you think that something is true or will happen, you mean that you have the impression that it is true or will happen, although you are not certain of the facts.

Idioms think the world of, [~ + object] to like or admire greatly: Her father thinks the world of her. Idioms think twice, to consider carefully before acting: urged him to think twice about going to …