Webster's Revised Unabridged Dictionary · 1913

Extravagant

Extravagant , adjective

[French extravagant, from Latin extra on the outside + vagans, -antis, present participle of vagari to wander, from vagus wandering, vague. See Vague.]

1.
Wandering beyond one's bounds; roving; hence, foreign. [Obsolete]
The extravagant and erring spirit hies To his confine. — Shakespeare
2.
Exceeding due bounds; wild; excessive; unrestrained; as, extravagant acts, wishes, praise, abuse.
There appears something nobly wild and extravagant in great natural geniuses. — Addison
3.
Profuse in expenditure; prodigal; wasteful; as, an extravagant man.
Extravagant expense. — Bancroft

Extravagant , noun

1.
One who is confined to no general rule. — L'Estrange
2.
(Ecclesiastical Hist.) Certain constitutions or decretal epistles, not at first included with others, but subsequently made a part of the canon law.