Conspire/kənˈspaɪər/ Definition 1 of 2Pro Tip 1/3Negative actions 'Conspire' often involves plans to harm someone or something, or break the law. The corrupt officials conspired to embezzle funds. Pro Tip 2/3Secretive nature Plans made when conspiring are usually kept secret from outsiders. The thieves conspired in hushed tones, glancing around nervously. Pro Tip 3/3Group activity 'Conspire' implies that more than one person is involved in making the plans. The siblings conspired to surprise their parents with a party.