1. To laugh heartily and at length (at someone or something). We all sat laughing away at my grandfather's hilarious stories. I love hearing the kids laughing away like that.

2. To pass a certain amount or period of time by laughing. In this usage, a noun or pronoun can be used between "laugh" and "away." Ms. Simpson's comedy routine will have you laughing the night away. Janet and I laughed away the hour trading stories from our childhood.

3. To try to dismiss, neutralize, or ignore something negative by laughing at or over it. In this usage, a noun or pronoun can be used between "laugh" and "away." He tried to laugh away the rude remarks from the audience during his interview. I know you like to laugh issues like these away, but you need to confront them sooner or later.