Of little importance; trivial. She was upset over a petty argument with her friend.
Narrow-minded or small-minded in attitude or behavior. His petty attitude made it difficult for him to work well with others.
Minor or subordinate in rank or position. He was given a petty role in the organization, which did not satisfy his ambitions.
Designating a crime or offence of lesser seriousness, typically punishable by relatively light penalties. He was charged with petty theft after taking a candy bar from the store.