any informal meal eaten outside or on an excursion

A meal eaten outdoors, as on an excursion, Formerly, an entertainment in which every partaker contributed his share to the general table; now, an entertainment or pleasure-party the members of which carry provisions with them on an excursion, as from a city to some place in the country_ also used adjectively_ as, a picnic party; picnic biscuits (a kind of small sweet biscuits), An easy or pleasant task, verb_ To eat a picnic, eat alfresco, in the open air