Party meaning : A person or group of people constituting a particular side in a contract or legal action. A person. A group of people forming one side in a given dispute, contest etc. A political group considered as a formal whole, united under one specific political platform of issues and campaigning to take part in government. A discrete detachment of troops, especially for a particular purpose. A group of persons collected or gathered together for some particular purpose. A part or division. To celebrate at a party, to have fun, to enjoy oneself. To take recreational drugs. To engage in flings, to have one-night stands, to sow one's wild oats. To form a party (with).