1. a barbecue, especially a social gathering where food is cooked outdoors on a grill
Usage: informal; chiefly Australian and New Zealand English
2. a Barbie doll, a fashion doll manufactured by Mattel
Usage: trademark; often capitalized

Examples

• We're having a barbie at the beach this weekend.
• Come over for a barbie and some cold drinks.
• My daughter got a barbie for her birthday.
• The kids played with their barbies in the backyard.
• Let's fire up the barbie and cook some steaks.
• She collected barbies as a child.