noun, plural lev·i·ties.
- lightness of mind, character, or behavior; lack of appropriate seriousness or earnestness.
- an instance or exhibition of this.
- lightness in weight.
noun plural -ties
- inappropriate lack of seriousness
- fickleness or instability
- archaic lightness in weight
n.“want of seriousness, frivolity,” 1560s, from Latin levitatem (nominative levitas) “lightness, frivolity,” from levis “light” in weight (see lever) + -ity.