0 past simple and past participle of test
1 to do something in order to discover if something is safe, works correctly, etc., or if something is present:
The drug is still being tested and will not go into commercial production for at least two years.
This piece of equipment is used to test alcohol levels in the blood.
It is theory tested by many individual research findings that permits the generation of predictions about program outcomes under different conditions.
The tree shrews were tested in a similar situation and rewarded with banana baby food.
We tested this idea by stimulating surrounds with large spots of light in the flat-mount preparation of the mouse retina.