1. Decorative undergarments, especially women's underwear with lace, ruffles, or other ornamental trim.
Usage: informal; usually plural
2. Unnecessary or decorative additions; embellishments or extras that are not essential.
Usage: informal; figurative; usually plural

Examples

• She preferred simple cotton underwear to fancy frillies.
• The new car came with all the frillies—leather seats, a sunroof, and a premium sound system.
• He didn't care about frillies; he just wanted a reliable, straightforward product.
• The dress was covered in frillies and lace.
• Some people love all the frillies that come with modern smartphones, while others want something basic.
• She packed her frillies carefully when preparing for her trip.