Definition of probity : adherence to the highest principles and ideals : uprightness formal : the quality of a person who is completely honest
Probity and its synonyms honesty, honor, and integrity all mean uprightness of character or action, with some slight differences in emphasis. Honesty implies a refusal to lie or deceive in any way. Honor suggests an active or anxious regard for the standards of one's profession, calling, or position.
probity(n.) Synonyms: integrity, uprightness, honesty, worth, rectitude, virtue, goodness, righteousness, trustworthiness, trustiness, principle, sincerity, truthfulness, veracity, honor, justice, equity, fairness, incorruptibility.
The noun probity can be countable or uncountable. In more general, commonly used, contexts, the plural form will also be probity. However, in more specific contexts, the plural form can also be probities e.g. in reference to various types of probities or a collection of probities.