1. extension ladder a ladder whose length can be extended
  2. electric toothbrush a toothbrush with an electric motor in the handle that vibrates the head of the brush
  3. extensive large in spatial extent or range or scope or quantity
  4. extended order a military formation for skirmishing
  5. extensiveness large or extensive in breadth or importance or comprehensiveness
  6. extension course a course offered as part of an extension service
  7. extensively in a widespread way
  8. extension cord an electric cord used to extend the length of a power cord
  9. extension agent an advisor employed by the government to assist people in rural areas with methods of farming and home economics
  10. expansive bit a bit with a cutting blade that can be adjusted to different sizes
  11. extended time scale (simulation) the time scale used in data processing when the time-scale factor is greater than one
  12. extensible capable of being protruded or stretched or opened out
  13. extended family a family consisting of the nuclear family and their blood relatives
  14. external carotid artery the branch of the carotid artery that supplies blood to the face and tongue and external parts of the head
  15. ostensibly from appearances alone
  16. ostensive definition a definition that points out or exhibits instances of the term defined
  17. exteroceptor any receptor that responds to stimuli outside the body
  18. extensor a skeletal muscle whose contraction extends or stretches a body part
  19. expensiveness the quality of being high-priced
  20. extension act of expanding in scope