noun
Refers to a pleasant smell, often used in the pattern 〜の香. Not used for bad smells.
See also: 花の香
花の香が部屋に漂っている。
The fragrance of flowers is drifting through the room.
このお茶は香が高い。
This tea has a rich aroma.
匂い is a general word for smell, good or bad, while 香 is limited to pleasant scents and often has a literary or elegant feel.
臭い is an adjective for bad smells; 香 is a noun for good smells.
The kanji 香 represents fragrance or incense. The reading か is the on'yomi, commonly used in compounds and as a standalone noun for pleasant smells.