1. in a way that is not suitable, proper, or fitting for a particular situation or context

Examples

• He dressed inappropriately for the formal dinner in casual jeans and a t-shirt.
• The teacher spoke inappropriately to the student, using harsh language that was unprofessional.
• She laughed inappropriately during the serious moment of silence.
• The comment was inappropriately timed, coming right before the announcement.
• He touched her shoulder inappropriately, making her uncomfortable.
• The joke was inappropriately crude for a family gathering.
• She behaved inappropriately at the job interview by checking her phone repeatedly.