Words, grammatical forms and meanings linked to the ontology.
tip-up en · ADJ
Meanings
(not-comparable, of a seat) Designed to tilt to a vertical position when not in use, either manually or of its own accord.
[...] there is no permanent division between the guard's section, which contains four tip-up seats, and the main passenger saloon. 1961 October, “New Metropolitan Line train sets enter service”, in Trains Illustrated, page 623:
tip-up en · NOUN
Meanings
A device used in ice fishing, having a flag that is raised to alert the angler when the bait below the ice is taken.