flagging /ˈflæɡɪŋ/noun 4adjective 1forms 1 noun4 •The process by which something flags or tires. •A pavement or sidewalk of flagstones; flagstones, collectively. •(slang) Use of a handkerchief code or analogous display to signal sexual interests. •The skewing or bending of the upper part of a television picture due to imperfect synchronization of the video signal. adjective1 •Becoming tired or less dynamic; declining in strength; dwindling.These cars without doubt were the salvation of the C.I.E. network, as they provided fast, economical services with a degree of comfort which did much to retrieve a flagging passenger traffic. — 1960 formsflaggings