1. most formal and proper in behavior or appearance; most strictly correct in a way that seems overly concerned with propriety
Usage: superlative form of ‘prim’

Examples

• She was the primmest student in the class, always sitting up straight with her hands folded.
• The primmest house on the street had perfectly manicured hedges and spotless windows.
• Even at the beach party, he remained the primmest person there, refusing to remove his tie.
• Her primmest smile appeared whenever the principal walked by.
• The primmest member of the book club always corrected others’ grammar.
• She wore her primmest dress to the formal dinner.
• His primmest behavior emerged during important meetings.