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The phrase center of attention means a person or thing that is interesting to everyone and draws the most attention in the room
There are a few possible origin stories for this common phrase.
The first origin story is that the expression developed from the verb center. The word center comes from the Greek kentrum, which means the center point of a compass. This word entered English in the 1300s and meant the center of a circle. By the 1590s, it meant the center of anything. People began using center figuratively by the 1680s. Center of attention is attested from 1868.
The second origin story comes from a related phrase the center of attraction, which, according to the American Heritage Dictionary of Idioms, comes from the field of physics.
According to this theory, center of attraction has been in use since around 1770, where it has denoted the point to which bodies tend by gravity or the action of centripetal force.