plural of can-opener

plural of eye opener

plural of garage door opener

(military) A military unit formed up so as to allow space between its ranks. / (nautical) A naval formation in which ships are four cables'-length (2880 feet) apart.

(Australia) Freedom to act without repercussions; free rein.

simple past tense and past participle of open up

Any system that does not use feedback

Synonym of open-neck

the state or quality of being open-ended

(mechanics) A type of differential gear used in automobile construction, allowing for output shafts to have different angular velocity, while equalizing torque applied to each output shaft.