n.
1.the temporal property of two things happening at the same time
2.the state of being joined together
3.an uninflected function word that serves to conjoin words or phrases or clauses or sentences
4.the grammatical relation between linguistic units (words or phrases or clauses) that are connected by a conjunction
5.(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac
6.something that joins or connects
Idiom of the Day
back up (someone or something) or back (someone or something) up
to support someone or something
The supervisor made a mistake and his manager refused to back him up.