1. secretly planned together to commit an unlawful or harmful act
Usage: past tense of conspire
2. worked together to bring about a particular result, especially an unfortunate one
Usage: past tense of conspire; often used figuratively

Examples

• The rebels conspired to overthrow the government.
• Several employees conspired to steal company funds.
• Bad weather and traffic delays conspired to ruin our vacation.
• The defendants conspired to commit fraud.
• Events conspired against us that day.
• They conspired in secret meetings to plan the coup.
• Circumstances conspired to make the situation worse.