interplanetary space

1. 1.

   the part of outer space within the solar system

   Broaderregion

   Narrowerinterplanetary medium

   Part ofouter space

   Partsasteroid belt

Questions about interplanetary space

What does interplanetary space mean?

interplanetary space means "the part of outer space within the solar system".

Is interplanetary space a common word?

interplanetary space is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.