strength  (strĕngkth, strĕngth, strĕnth)n. 1. The state or quality of being strong; physical power or capacity: the strength needed to lift a box. 2. The capacity to resist attack; impregnability: the strength of the ship’s armor. 3. The capacity to resist strain or stress; durability: the strength of the cables. 4. The ability to deal with difficult situations or to …