Initialism of Australian Council of Trade Unions.

(historical units of measure) A former Roman unit of length, equal to 120 Roman feet (about 35.5 m)

(law) An act, or series of acts, considered as separate from the intentions or state of mind of the perpetrator in the context of criminal law.

plural of actus reus

(law) A doctrine of law that, in certain circumstances, an intervening event can break the chain of causation between a person's action and its result, potentially depriving that person of legal liability for the result; such an intervening event.

(programming) A value supplied to a method or function, as opposed to a formal parameter.

(finance) something actually received; real receipts, as distinct from estimated ones.

(chiefly theology) relating to a person's acts or deeds; active, practical / Existing in reality, not just potentially; really acted or acting; occurring in fact.

The final real things in the universe, that are "experiential" in nature rather than strictly material. The most basic thing or construct in the universe. Some Whitehead scholars would hold that trillions of Actual Occasions compose one quark. Actual occasions make up everything, even empty space:

(Britain, law) Hurt or injury which interferes with the health or comfort of the victim and which is more than transient or trifling.