The act of ascending; a rising. It is frequently applied to the visible elevation of our Savior to Heaven.

The thing rising, or ascending.

In astronomy, ascension is either right or oblique. Right ascension of the sun or of a star, is that degree of the equinoctial, counted from the beginning of Aries, which rises with the sun or star, in a right sphere. Oblique ascension is an arch of the equator, intercepted between the first point of Aries, and that point of the equator which rises together with a star, in an oblique sphere.