1. To desire physical activity with someone in order to produce offspring and/or to experience pleasure. English = feel sexual, feel sexually aroused, feel sexually attracted to. Idiomatic English = have the hots. Informal English = (be) horny.
2. To have the quality of arousing sexual feelings in others. English = (be) sexy.
3. To feel a strong sexual desire for someone, especially when that involves little, if any, emotional engagement. Often used in a disapproving sense. English = lust for, lust after.