(usually in the plural) Operation; action.

Method of operation.

(arithmetic) The incidental or subsidiary calculations performed in solving an overall problem.

Fermentation.

(of bodies of water) Becoming full of a vegetable substance.

A place where work is carried on.

(countable) A train movement.

present participle and gerund of work

That is or are functioning.

That suffices but requires additional work.

In paid employment.

Of or relating to employment.

Enough to allow one to use something.

Used in real life; practical.