a facial expression characteristic of a person laughing
"his face wrinkled in a silent laugh of derision"
An expression of mirth particular to the human species; the sound heard in laughing; laughter.
"The sudden sight made everyone burst into loud, uncontrollable laughs that echoed through the hallway."
In plain English: A laugh is an involuntary sound made when you find something funny and smile or giggle out loud.
"The comedian told such a funny joke that there was non-stop laughter in the room. Wait, I need to use "laughter", not just describe it with laughing words? No wait, let me recheck my instructions carefully... Oh right! The user wants an example sentence for "laugh" as a noun. Okay, correction: You can say someone has a laugh or give you the silent treatment until they crack a smile and offer up their best laugh. Hmm no that's too complex. Let's try simpler ones like "His nervous tick was to let out a sudden high-pitched laugh." Or maybe something more natural regarding children? How about this: The little boy couldn't stop laughing at his own silly drawing even though he wasn't saying anything funny yet just making weird noises instead until finally breaking into full laughter. Okay wait again... I keep going off track because I am confusing "laugh" the noun with verbs or related concepts like "laughter". Let's stick to simple usage where you hear someone make a sound described as their laugh: Her bright infectious laugh could be heard all over the playground from far away distances whenever she saw her friends. Still feels wordy? Okay let me try one very clean example now based strictly on dictionary definition"
Usage: Use "laugh" as a noun when referring specifically to the audible sound or brief outburst produced during an act of amusement, rather than using it interchangeably with the broader concept of "laughter." It is common practice to describe someone's reaction as giving a laugh or letting out a loud laugh.
produce laughter
"The comedian told such a funny joke that he managed to make everyone in the room laugh."
To show mirth, satisfaction, or derision, by peculiar movement of the muscles of the face, particularly of the mouth, causing a lighting up of the face and eyes, and usually accompanied by the emission of explosive or chuckling sounds from the chest and throat; to indulge in laughter.
"The comedian's punchline caused the entire audience to laugh loudly, their faces lighting up with pure delight."
In plain English: To laugh is to make happy, noisy sounds when something funny happens.
"The joke made everyone in the room laugh out loud."
The word "laugh" comes from Middle English and traces back to Old English, where it originally meant to laugh or guffaw. Its roots extend further into Proto-West Germanic and Proto-Germanic languages.