half-open

adj — 2 senses

adj

Etymology From half- + open.

partially open; ajar

Between the fixed, full-height ends run flexible covers, carried on tubes running in guides, which can be locked in the closed, half-open or fully open positions; [...].1964 April, G. Freeman Allen, “The BRB shows traders the Liner train prototypes”, in Modern Railways, page 265:

Mathematics, Sciences (referring to an interval on the real line) containing only one of its endpoints

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.