If you mean, "astronomical unit," then it is a measurement of distance. One AU is the distance from the Sun to the Earth. So for example, the Earth is 1 AU from the sun, and Pluto is about 70.
Astronomical is an adjective that has a couple meanings. The first meaning of astronomical is relating to astronomy, and the second meaning of astronomical is extremely large.
To unite by a butt weld.
Unite.
It can either be a quantity related to astronomy, or it may be a case of the informal use of "astronomical" meaning "very large".
To Unite ,A unit in the connected series
The meaning of the name Bambanani in Shona language of the African origin is "unite."
The meaning of the name Batanai in Shona language of the African origin is "Unite."
if we don't come together, we will die.
Merger is the when two or more forms or parties unite
fuse, combine
To combine by synthesis; to unite., To produce by synthesis; as, to synthesize albumin.
If relating to the Democratic Republic of the Congo: Justice, Paix, Travail. Meaning: Justice, Peace, Work. If relating to the Republic of the Congo: Unite, Travail, Progres. Meaning: Unite, Work, Progress.