Unprepared/ˌʌnprɪˈperd/ Definition 1 of 2Pro Tip 1/3Unexpected Situations Used when someone is caught off guard by a sudden event or situation. She was unprepared for the early arrival of her guests. Pro Tip 2/3Lack of Resources Highlights a situation where necessary tools or equipment are missing. The campers were unprepared for the cold, lacking warm clothing. Pro Tip 3/3Implying Negligence Can suggest a lack of responsibility or foresight when facing responsibilities. The project failed because the team was unprepared.