con·crete²/`kɑnkrit; ˈkɒŋkriːt/ adj 1 made of concrete 混凝土（制）的: a concrete floor 混凝土地板 2 clearly based on facts, not on beliefs or guesses 具体的; 确定的; 明确的: concrete information/evidence/facts etc We need concrete information about the man's identity. 我们需要有关那个人身分的具体资料。