1. the quality or state of being frothy; the presence of foam or bubbles
2. lack of substance or seriousness; superficiality
Usage: figurative

Examples

• The frothiness of the cappuccino made it light and airy.
• The ocean's frothiness increased as the waves grew larger.
• Critics dismissed the film for its frothiness and lack of meaningful plot.
• The frothiness of the shampoo helped it spread evenly through her hair.
• His speech was full of frothiness—lots of words but little real content.
• The frothiness of the beer faded after it sat in the glass for a few minutes.