The Collaborative International Dictionary of English v.0.48:
Disband \Dis*band"\ (?; see Dis-), v. t. [imp. & p. p.
Disbanded; p. pr. & vb. n. Disbanding.] [Pref. dis- +
band: cf. OF. desbander, F. d['e]bander, to unbind, unbend.
See Band, and cf. Disbend, Disbind.]
1. To loose the bands of; to set free; to disunite; to
scatter; to disperse; to break up the organization of;
especially, to dismiss from military service; as, to
disband an army.
They disbanded themselves and returned, every man to
his own dwelling. --Knolles.
2. To divorce. [Obs.]
And therefore . . . she ought to be disbanded.