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center on (someone or something)
1. To focus on someone or something. A noun or pronoun can be used between "center" and "on." But it's Beth's surprise party, not yours, so all the decorations and games should center on her and her alone. This novel centers on the protagonist's journey to self-discovery.
2. To position something in the center of a space, usually a wall. A noun or pronoun can be used between "center" and "on." That picture just isn't centered on the wall—tilt it a little more to the left.
center something on someone or something
to base something on someone or something. Let us center the discussion on Walter. Our whole meeting was centered on the conservation question.
center on someone or something
to focus on someone or something in particular. Let us center on the basic problem and try to solve it. I want to center on Liz and her contributions to the firm.
1. To be concerned primarily with something: This chapter centers on the childhood of one of the characters.
2. To make or do something that is concerned primarily with something else: We centered our analysis on the best pieces of evidence.
3. To place something at the center of some location: We centered the painting on the wall.