1 the act or an instance of ascending.
2 (Ascension) the ascent of Christ into heaven on the fortieth day after the Resurrection.
Phrases and idioms:
Ascension Day the Thursday on which this is celebrated annually. right ascension Astron. longitude measured along the celestial equator.
Derivatives:
ascensional adj.
Etymology: ME f. OF f. L ascensio -onis (as ASCEND, -ION)
Useful english dictionary. 2012.