This is the 3035th most frequent Catalan word.
lleugera
The Catalan word "lleugera" means "light" (not heavy) in English.
In this sentence, 'lleugera' is used to describe the physical characteristic of being light in weight, as applied to the backpack.
La motxilla és lleugera i fàcil de portar.
The backpack is light and easy to carry.
Here, 'lleugera' characterizes the salad as being light, likely in terms of its digestibility or calorie content.
Després de menjar una amanida lleugera, em sento millor.
After eating a light salad, I feel better.
In this case, 'lleugera' relates to the nature of the conversation, indicating it was not serious or heavy in content but rather casual.