A pleasant smell or fragrance (often used in expressions like 'the scent of ~' or 'flower scent'); a somewhat literary term for aroma.
庭の花の香が窓から入ってきた。
The scent of the garden flowers came in through the window.
お茶の香を楽しみながら一服する。
To take a break while enjoying the aroma of the tea.
部屋にいい香を焚くと落ち着く。
Burning a pleasant fragrance in the room is calming.