—n.
1 a a special or noteworthy event or happening (dressed for the occasion). b the time or occurrence of this (on the occasion of their marriage).
2 (often foll. by for, or to + infin.) a reason, ground, or justification (there is no occasion to be angry).
3 a juncture suitable for doing something; an opportunity.
4 an immediate but subordinate or incidental cause (the assassination was the occasion of the war).
—v.tr.
1 be the occasion or cause of; bring about esp. incidentally.
2 (foll. by to + infin.) cause (a person or thing to do something).
Phrases and idioms:
on occasion now and then; when the need arises. rise to the occasion produce the necessary will, energy, ability, etc., in unusually demanding circumstances. take occasion (foll. by to + infin.) make use of the opportunity.
Etymology: ME f. OF occasion or L occasio juncture, reason, f. occidere occas- go down (as OB-, cadere fall)
Useful english dictionary. 2012.