·superl Showy; ostentatious.
II. Vain ·noun Vanity; emptiness;
— now used only in the phrase in vain.
III. Vain ·superl Having no real substance, value, or importance; empty; void; worthless; unsatisfying.
IV. Vain ·superl Destitute of forge or efficacy; effecting no purpose; fruitless; ineffectual; as, vain toil; a vain attempt.
V. Vain ·superl Proud of petty things, or of trifling attainments; having a high opinion of one's own accomplishments with slight reason; conceited; puffed up; inflated.