concrete noun
ADJ. solid | bare a floor made of bare concrete | wet | pre-cast, ready-mix/ready-mixed, reinforced
QUANT. layer, slab
VERB + CONCRETE mix | lay, pour | be made from/(out) of | set sth in The pathway is formed from large pebbles set in concrete. (figurative) I do not regard the constitution of the United Kingdom as set in concrete.
CONCRETE + VERB set Before the concrete sets the surface can be given a final smoothing over.
You can also check other dicts: concrete (English, 中文解释 ), wordnet sense, Collins Definition