Englishfor English speakers
operating
—
adjective
involved in a kind of operation
the operating conditions of the oxidation pond
—
adjective
(= operational, in operation)
being in effect or operation
de facto apartheid is still operational even in the 'new' African nations
— Leslie Marmon Silko
bus service is in operation during the emergency
the company had several operating divisions
angle
Noun
—
When two straight lines come together, they make an angle.
A 90° angle is called a right angle.