ABDICATION n.
The act of abdicating; the renunciation of a high office, dignity, or trust, by its holder; commonly the voluntary renunciation of sovereign power; as, abdication of the throne, government, power, authority.
ABERRATION n. 2 definitions
earth in its orbit, and dairy or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.