gig‧gle1 past tense and past participle giggled, present participle giggling [intransitive]
to laugh quickly, quietly, and in a high voice, because something is funny or because you are nervous or embarrassed:
If you can't stop giggling you'll have to leave the room.
WORD FOCUS: laugh WORD FOCUS: laugh giggleto laugh repeatedly in a silly way because you are amused, embarrassed, or nervous sniggerto laugh unkindly and quietly, especially at something that is not meant to be funny chuckleto laugh quietly, especially because you are thinking about something funny roar/howl with laughterto laugh very loudly because you think something is very funny be in hystericsto laugh uncontrollably crack upinformalto suddenly start laughing a lot ➔ See alsolaugh
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.