A complex repertoire of behavioral tendencies.
A style of behavior with identifiable patterns of thinking, perceiving, and decision-making across different types of situations

—Agaibi, C.E. and J.P. Wilson, “Trauma, PTSD, and Resilience: A Review of the Literature,” Trauma Violence and Abuse, 2005. 6(3): pp. 195–216.

A generalized mode of functioning that incorporates a strong sense of commitment and meaning in life, an expectation that one can control or influence outcomes, and an adventurous, exploring approach to living.

—Bartone, P.T., T. Spinosa, and J. Robb. “Psychological Hardiness Is Related to Baseline High-Density Lipoprotein (HDL) Cholesterol Levels,” in Association for Psychological Science Convention. 2009. San Francisco, CA.

• (a) having curiosity and intellectual mastery;
• (b) having compassion—with detachment;
• (c) having the ability to conceptualize;
• (d) obtaining the conviction of one’s right to survive;
• (e) possessing the ability to remember and invoke images of good and sustaining figures;
• (f) having the ability to be in touch with affects, not denying or suppressing major affects as they arise;
• (g) having a goal to live for;
• (h) having the ability to attract and use support;
• (i) possessing a vision of the possibility and desirability of restoration civilized moral order;
• (j) having the need and ability to help others;
• (k) having an affective repertory;
• (l) being resourceful;
• (m) being altruistic toward others;
• and (o) having the capacity to turn traumatic helplessness into learned helpfulness”

—Bell, C.C., “Cultivating Resiliency in Youth,” Journal of Adolescent Health, 2001. 29: pp. 375–381.