This is the 7767th most frequent Spanish word.
léger
The word "léger" is not Spanish; it is French and means "light" (in weight) or "subtle."
In this context, 'ligero' is used to describe a light or not heavy design.
Este vestido tiene un diseño muy ligero.
This dress has a very light design.
Here, 'ligero' refers to a meal that is not heavy or abundant.
Él tomó un desayuno ligero antes de salir.
He had a light breakfast before going out.
'Ligero' in this usage describes a tone, meaning casual or non-serious.