1. intergalactic space the space between galaxies
  2. intergalactic existing or occuring between collections of star systems
  3. interplanetary space the part of outer space within the solar system
  4. eclectic selecting what seems best of various styles or ideas
  5. interest expense interest paid on loans
  6. intercollegiate used of competition between colleges or universities
  7. extragalactic nebula a collection of star systems
  8. interspecies arising or occurring between species
  9. intraspecies arising or occurring within a species
  10. interstellar space the space between stars
  11. intractable difficult to manage or mold
  12. intercalate insert (days) in a calendar
  13. interconnectedness a state of being connected reciprocally
  14. Antarctic Ocean the southern waters surrounding Antarctica
  15. Antarctic Zone the region around the south pole: Antarctica and surrounding waters
  16. interplanetary gas a rarefied flow of gas and charged particles (plasma) that stream from the sun and form the solar wind
  17. interrogative sentence a sentence of inquiry that asks for a reply
  18. intercom speaker the loudspeaker on an intercom or public address system
  19. international logistic support arrangements made between nations to assist each other
  20. interactive capable of influencing each other