Webster’s Revised Unabridged Dictionary · 1913
Picnic
Pic′nic, n. [Cf. F. piquenique. See Pick, v., and cf. Knickknack.] Formerly, an entertainment at which each person contributed some dish to a common table; now, an excursion or pleasure party in which the members partake of a collation or repast (usually in the open air, and from food carried by themselves).
Pic′nic, v. i. [imp. & p. p. Picnicked; p. pr. & vb. n. Picnicking.] To go on a picnic, or pleasure excursion; to eat in public fashion.