One against whom there is opposition; the opposed party.

In an opposed manner

Alternative form of window of opportunity

plural of opportunity class

(Australia, education) A separate primary-school class for teaching gifted children. / (historical, education) A separate class for teaching backward children.

(historical, education) Synonym of opportunity class (“separate class for teaching backward children”)

plural of opportunity room

People are more likely to steal anything if presented with a convenient opportunity to do so.

(military) A target onto which one's attack is diverted as soon as it is seen or becomes known. / (figuratively, by extension) An object to which one's efforts are diverted as soon as it becomes known.

(rare) Devoid of opportunity.