Meanings

smileTo smile big or make a sound when one is happy or satisfied.
smile; laughTo produce a certain type of smile or laughter by making a sound or wearing a look on one's face.
laugh atTo despise and make fun of someone because his/her words or actions are unacceptable or not right.

Examples from Lessons (3)

하트하고 웃는 표정 을 자주 써요.They often use hearts and smiling faces.Read the Lesson

아이돌이 환하게 웃으며 인사해요.The idol smiles brightly and says hello.Read the Lesson

친구 는 환하게 웃으며 인사 를 해.His friend smiles brightly and says hello.Read the Lesson