Definitions
1.PronounAnything whatsoever, any part."for aught I know/care"
2.AdverbAt all, in any degree, in any respect.
3.NounWhit, the smallest part, iota.
4.NounZero.
5.NounThe digit zero.
6.NounEstimation."in my aught"
7.NounOf importance or consequence (in the phrase "of aught")."an event of aught"
8.NounEsteem, respect."a man of aught; Show some aught to your elders, boy."
9.VerbObsolete or dialectal form of ought
10.NumeralObsolete or dialectal form of eight.