Loosely used, it connotes a reversion to an earlier type.
Elsewhere "Pelasgian" in Herodotus connotes anything typical of, or surviving from, the state of things in Greece before the coming of the Hellenes.
However, ' a work of art ', etc. also connotes something that has achieved a certain cultural status.
The taking of omens may be said to be a part of all systems of divination, in which the future is predicted by means of indications of one sort or another; and tradition has thus gathered round many subjects - events, actions, colours, numbers, &c. - which are considered "ominous," an adjective which generally connotes ill-fortune.
It may be noted that the original sense of "demon" was a benevolent being; but in English the name now connotes malevolence; in German it has a neutral sense, e.g.