Grittiness/ˈɡrɪtinəs/ Definition 1 of 3Pro Tip 1/3Mental Toughness Refers to someone's strength of character and ability to overcome difficulties. His grittiness allowed him to thrive even in the hardest times. Pro Tip 2/3Positive Trait Often seen as a commendable quality in a person, evoking respect. Her grittiness in studying for exams won her teachers' admiration. Pro Tip 3/3Challenging Contexts Usually referenced when a person faces significant challenges or adversity. The athlete's grittiness shone through despite the injury.