A favorable opportunity; a convenient or timely chance. / The time when something happens. / An occurrence or state of affairs which causes some event or reaction; a motive or reason.

(transitive) To cause; to produce; to induce

plural of occasion

Third-person singular simple present indicative form of occasion

simple past tense and past participle of occasion

present participle of occasion

occasionally, from time to time, now and then

Of or pertaining to the setting sun; falling, descending; western.

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:

(idiomatic) To show resolve or effectiveness in dealing with a difficulty. / (idiomatic, euphemistic, humorous) To achieve erection for sexual intercourse.