0 to laugh at someone or something in a silly and often unkind way:
What are you snickering at/about?
People were staring and snickering.
1 the act of laughing at someone or something in a silly and often unkind way:
2 to laugh quietly at someone or something that you think is silly or slightly ridiculous:
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.