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Webster 1913 Edition

Noun.

[L.

longanimitas

;

longus

long +

animus

mind: cf. F.

longanimité

Disposition to bear injuries patiently; forbearance; patience.

Jer. Taylor.

Noun.

[L. longanimitas; longus, long, and animus, mind.]

Forbearance; patience; disposition to endure long under offenses.

longanimity ‎(uncountable)

(now rare) Patience or tolerance in the face of adversity; forbearance, long-suffering.
- 1646, Thomas Browne, Pseudodoxia Epidemica, I.3:
  It had overcome the patience of Job, as it did the meekness of Moses, and would surely have mastered any, but the longanimity, and lasting sufferance of God [...].