adjective Of a person, their manner or appearance: Formal and precise; stiffly decorous.
adjective Prudish; straight-laced.
adjective Of things: Neat; trim.
prim regularity
verb To make one's expression prim. .mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[with up]
verb To give a prim or demure expression to (one's face, mouth, or lips).
verb To dress (one) up affectedly or demurely. [with up or out]