Final answer:
Romantic love, as defined by Sternberg's triangular theory of love, encompasses passion and intimacy but lacks commitment.
Step-by-step explanation:
According to Sternberg's triangular theory of love, the type of love defined by passion and intimacy but without commitment is known as romantic love. This form of love is typically characterized by a strong physical attraction and emotional connection between partners, yet lacks a long-term promise or decision to stay together. Romantic love may be intense and exhilarating, often experienced in the early stages of a romantic relationship.