Definition of 'concrete'

Noun

1. a strong hard building material composed of sand and gravel and cement and water

Verb

1. cover with cement; "concrete the walls"
2. form into a solid mass; coalesce

Adjective

1. capable of being perceived by the senses; not abstract or imaginary; "concrete objects such as trees"
      Antonyms: abstract
2. formed by the coalescence of particles

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