An act, deed, or proceeding; something that is in the process of being, or has been, done or performed. Now archaic and rare.

The exertion of force or influence; working, activity; a manner of working, the way in which a thing works.

Ability to work, power to act; action, operation; working. Obsolete.

With reference to a thing (material or abstract): the exertion of energy or influence; working, operation (as opposed to inaction or repose).

The process of doing something; acting, action, operation. Cf. in the act (of) at phrases 1.

In singular and plural. The (influential or powerful) action or operation of a natural force or substance. Obsolete.

The state of being active; the quality or condition of being an agent or of performing an action or operation; the exertion of energy, force, or…

Action, operation. Obsolete.

Action, operation, activity, working (often implying rapid movement, rapid change, or variety). Frequently with of.

†(a) activity, efficaciousness (obsolete); (b) the fact or action of engaging in (hard) work; the condition of being so engaged.

Operation, action, energy. Obsolete.

The exertion of force or influence; working, activity, operation; an instance of this.

Ability or capacity to act or exert power; active working or operation; action, activity.

= operancy, n.

A physical operation, action, or process.

The quality or fact of being operant; operation.

The action or process by which something is developed, manifested, or accomplished; the unfolding of events in accordance with a plan, or as the…

gen. Indirect or intermediate agency, intermediacy; instrumentality.

The action or an act of performing or fulfilling a function; operation; working.