signum, indicium (a mark): ostentum, prodigium, portentum (a remarkable appearance; ostentum, general term, an unusual appearance having reference to the future; prodigium and portentum, of prodigies having reference to the distant future, especially to coming calamities; prodigium, any extraordinary appearance of nature; portentum, anything foretelling): omen (anything seen or heard accidentally, by which good or evil is foreboded): augurium (a sign of things future from the flight of birds): a good omen, omen bonum, dextrum, secundum, faustum: a bad or evil omen, omen triste, foedum, funestum: to accept or be satisfied with an omen, omen accipere; placet omen.