1. impossible to resist or refuse; too attractive or appealing to be resisted
2. too powerful to be stopped or overcome

Examples

• The chocolate cake was absolutely irresistible.
• She had an irresistible urge to laugh during the serious meeting.
• The store's sale prices were irresistible to bargain hunters.
• His charming smile made him irresistible to everyone he met.
• The army faced an irresistible enemy force.
• The irresistible pull of gravity drew the object downward.
• Children find the playground irresistible on sunny days.