white space

noun
  1. the unprinted area of a piece of printing, as of a poster or newspaper page, or of a portion of a piece of printing, as of an advertisement; blank space: White space is as effective in a layout as type.

Origin of white space

First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018