(not comparable) Unable to reproduce (or procreate).

(figurative) Terse; lacking sentiment or emotional stimulation, as in a manner of speaking.

(figurative) Fruitless, uninspiring, or unproductive.

Germless; free from all living or viable microorganisms.

Free from dangerous objects, as a zone in an airport that can be only be entered via a security checkpoint.

(US, military) Of weapons: foreign-made and untraceable to the United States.