To make something concrete, tangible, or real; to convert abstract ideas into specific, solid forms.
From concrete (Latin concretus) plus -ize suffix (Greek -izein, 'to cause to be'). The verb form was popularized in the 20th century to describe turning abstractions into practical reality.
Good teachers concretize—they don't just talk about 'angles' but have students measure actual corners of the classroom; abstract concepts stick in your brain way better when you can touch, see, or build something real.
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