The noun picnic has 3 senses (first 2 from tagged texts)
1. (2) field day, outing, picnic -- (a day devoted to an outdoor social gathering)
2. (1) cinch, breeze, picnic, snap, duck soup, child's play, pushover, walkover, piece of cake -- (any undertaking that is easy to do; "marketing this product will be no picnic")
3. picnic -- (any informal meal eaten outside or on an excursion)
Overview of verb picnic
The verb picnic has 1 sense (first 1 from tagged texts)
1. (1) picnic -- (eat alfresco, in the open air; "We picnicked near the lake on this gorgeous Sunday")