northern lights

Definitions

1. The aurora of the northern hemisphere.
   plural, plural-only
2. Alternative letter-case form of northern lights.
   alt-of

Equivalents

Examples

“A common and beautiful side-effect of high solar activity is the Aurora Borealis - the northern lights that dance⟳ across Arctic skies. […] Ships' logs noted observations of the northern lights as far south as the Caribbean, and telegraph systems across the world were disrupted as electrical currents were induced in the copper lines.”

CEFR level