You know, I just re-read these dictionary definitions and realized that I was wrong! Based on the definitions in Merriam-Webster, if you're female and your guy has inserted ANY part of his body (fingers, tongue, etc.) in your mouth, vagina, or ass, you're no longer a virgin!
Touching intimate parts of another person's body (penis / vulva / anus / breasts) to obtain sexual gratification and release, either for yourself or for them. Or, if you are a male, inserting your penis into a woman's vagina - obviously for sexual pleasure. Or if you are a woman, accepting or impaling your vagina on a male's penis for purposes of sexual pleasure - either to feel sexual delight yourself or to give sexual delight to another.