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blue

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adjective American English pronunciation: blue /blu/ 
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adjectiveblue
comparativebluer
superlativebluest
  1. 1
    something that is blue is the same color as the sky on a clear sunny day. If something is similar to this color, you can say that it is a bluish color

    He looked at her with his pale blue eyes.

    The sky was gloriously blue.

    blue with cold:

    My fingers were turning blue with cold.

  2. 2
    informal feeling slightly sad

    She usually calls her mother when she's feeling blue.

phrases

derived word

blueness

noun [uncountable]

hostile architecture

the design of buildings or public spaces in a way which discourages people from touching, climbing or sitting on them …

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