Meaning of “picnic” - Learner’s Dictionary

picnic

noun [ C ] us uk /ˈpɪknɪk/

A1 a meal that you make and take with you somewhere to eat outside:

We're going to have a picnic down by the lake.
picnic verb [ I ] present participle picnicking, past tense and past participle picnicked

(Definition of “picnic” from the Cambridge Learner’s Dictionary © Cambridge University Press)