Definition

Lighthearted, playful, or gently foolish in a way that's often endearing rather than mean-spirited; lacking seriousness without being malicious.

Example Usage

The kids were being silly, running around in circles and giggling uncontrollably.

Origin

From Old English 'selig' (blessed, innocent), which evolved to mean simple or harmless, then took on the modern sense of playfully foolish.

Fun Fact

Silliness is actually beneficial for children's cognitive development and social bonding, according to developmental psychologists.

Source: Definition backfill (hailey)