1.VerbTo position (objects, people, time slots, etc.) at regular intervals with a calculated space between them.
"She spaced out the yoga mats as much as she could while leaving room for some walkways.; She spaced out her scheduled events as much as she could while leaving time for question-and-answer sessions."
2.VerbTo become distracted or disoriented; to lose attention or focus.
"She spaced out when the speaker started droning about the fine-print details of convertible debentures."
3.VerbTo increase the white space between letters, words or lines.