assertive /əˈsɝtɪv/adjective 2noun 1forms 3 adjective2 •Boldly self-assured; confident without being aggressive. •Pungent. noun1 •An assertion.Proportionative assertives occur in styles of all kinds, from the least formal to the most formal. Satisfactory declarative equivalents do not exist. — 1971 formsassertives · more assertive · most assertive