1. optional possible but not necessary; left to personal choice
  2. optionally in an optional manner
  3. emotionless unmoved by feeling
  4. Egyptian lupine white-flowered Eurasian herb widely cultivated for forage and erosion control
  5. operational cell a terrorist cell that performs clandestine activities
  6. ambitionless having little desire for success or achievement
  7. occupation license a license to pursue a particular occupation
  8. occupation licence a license to pursue a particular occupation
  9. motionless completely still
  10. option one of a number of things from which only one can be chosen
  11. uppishness assumption of airs beyond one's station
  12. kitchen help help hired to work in the kitchen
  13. operationalism (philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it
  14. inception an event that is a beginning
  15. operationalist of or relating to or espousing operationalism
  16. nationalism the doctrine that your country's interests are superior
  17. occupational disease disease or disability resulting from conditions of employment (usually from long exposure to a noxious substance or from continuous repetition of certain acts)
  18. emotional person a person subject to strong states of emotion
  19. Egyptian henbane poisonous herb whose leaves are a source of hyoscyamine
  20. occupational therapy therapy based on engagement in meaningful activities of daily life, especially to enable or encourage participation in such activities in spite of impairments or limitations in physical or mental functions