what is the definition of love according to cyrano

I'm not certain where you are looking at but Cyrano does describe his love Roxanne in loving terms:

She's a danger mortal,
All unsuspicious--full of charms unconscious,
Like a sweet perfumed rose--a snare of nature,
Within whose petals Cupid lurks in ambush!
He who has seen her smile has known perfection,
--Instilling into trifles grace's essence,
Divinity in every careless gesture;
Not Venus' self can mount her conch blown sea-ward,
As she can step into her chaise a porteurs,
Nor Dian fleet across the woods spring-flowered,
Light as my Lady o'er the stones of Paris!. . .