The song "Definitely Not in Love" by DIAMANTE is about a person who is adamant that they are not in love with someone, despite the other person's advances and affectionate gestures. The lyrics express the narrator's resistance to being in a romantic relationship with the other person, highlighting their annoyance with their jokes, driving, piercings, and overall personality. The song also portrays a sense of independence and self-assuredness, as the narrator is confident in their own feelings and unwilling to be swayed by the other person's attempts at romance. Overall, the song conveys a message of empowerment and self-respect in the face of unwanted romantic advances.