Definitions
1.adjectiveUnable to reproduce (or procreate).
2.adjectiveTerse; lacking sentiment or emotional stimulation, as in a manner of speaking.
3.adjectiveFruitless, uninspiring, or unproductive.
4.adjectiveGermless; free from all living or viable microorganisms."a sterile kitchen table"
5.adjectiveFree from dangerous objects, as a zone in an airport that can be only be entered via a security checkpoint.
6.adjectiveOf weapons: foreign-made and untraceable to the United States.