n affectionate play (or foreplay without contact with the genital organs)
v touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.
v touch lightly or gently
a. 接吻的
1. They were kissing under the stars.
他们在星空下亲吻。
2. She kissed him goodbye before leaving.
她在离开之前吻了他告别。
3. Kissing is a way to show love and affection.
亲吻是表达爱与情感的一种方式。