The word proximity means nearness or closeness. "Because of the proximity of our desks, I couldn't help but notice him cheating on the exam." Your favorite thing about your neighborhood of attached row houses might be the proximity of your neighbors — they're really close to you.

What does proximity mean?

: the quality or state of being proximate : closeness.

Is close proximity redundant?

Redundancies are words that unnecessarily repeat information. Because proximity indicates nearness or closeness, the modifier close in the familiar expression close proximity is redundant.