(law, formal) An estate in land held under a lease which is not perpetual or indefinite in length, though in some cases may be contingent on some guaranteed occurrence.

plural of transition year / (Ireland, slang) Students doing a transition year.

An optional one-year school programme that can be taken in the year after the Junior Certificate in Ireland. / A student currently doing a transition year.

(astronomy, physics) A unit of a million lightyears.

plural of megalight-year

gap year; sabbatical year

Synonym of man-year

plural of person-year

plural of terawatt-year

(electricity) A unit of electrical energy equal to that done by one terawatt acting for one year.