secco adjective 2noun 2forms 1 adjective2 •Dry.Secco painting, or painting in secco, is painting on dry plaster, as distinguished from fresco painting, on wet or fresh plaster. •Dry, sparse accompaniment, staccato, without resonance. noun2 •A work painted on dry plaster, as distinguished from a fresco.The Roman frescoes are generally robust, but the Chinese and Egyptian seccos are inherently weak […] — 1987 •(Australia) Section commander, an infantry soldier responsible for about 8 other soldiers. formsseccos