The noun strength has 9 senses (first 7 from tagged texts)
1. (42) strength -- (the property of being physically or mentally strong; "fatigue sapped his strength")
2. (10) military capability, military strength, strength, military posture, posture -- (capability in terms of personnel and materiel that affect the capacity to fight a war; "we faced an army of great strength"; "politicians have neglected our military posture")
3. (4) force, forcefulness, strength -- (physical energy or intensity; "he hit with all the force he could muster"; "it was destroyed by the strength of the gale"; "a government has not the vitality and forcefulness of a living man")
4. (2) forte, strong suit, long suit, metier, specialty, speciality, strong point, strength -- (an asset of special worth or utility; "cooking is his forte")
5. (1) persuasiveness, strength -- (the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty; "the strength of his argument settled the matter")
6. (1) intensity, strength, intensity level -- (the amount of energy transmitted (as by acoustic or electromagnetic radiation); "he adjusted the intensity of the sound"; "they measured the station's signal strength")
7. (1) potency, effectiveness, strength -- (capacity to produce strong physiological or chemical effects; "the toxin's potency"; "the strength of the drinks")
8. strength -- (the condition of financial success; "the strength of the company's stock in recent weeks")
9. lastingness, durability, enduringness, strength -- (permanence by virtue of the power to resist stress or force; "they advertised the durability of their products")