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.

plural of transition map

(differential geometry) Synonym of transition function.

plural of transitional provision

(psychology) An object, such as a security blanket or stuffed toy, used by a young child to self-soothe and cope with separation from a parent or other attachment figure.

plural of transitional object

(aviation) The lowest flight level above the transition altitude; depends on the transition altitude and the measured or calculated sea-level atmospheric pressure. The flight level at which a descending aircraft's barometric altimeters are reset from a constant setting of 1013.25 hectopascals to the setting corresponding to the actual measured or calculated atmospheric pressure at mean sea level.

(aviation) The airspace above the transition altitude but below the transition level.

(aviation) The altitude (which varies by country) above which an aircraft's barometric altimeters are set as if the sea-level atmospheric pressure were equal to 1013.25 hectopascals (regardless of the actual atmospheric conditions) and altitudes are reported as flight levels.