horizon
noun
- where ground meets sky
- a bedding surface where there is marked change in the lithology within a sequence of sedimentary or volcanic rocks or a distinctive layer or thin bed with a characteristic lithology or fossil content within a sequence
Wiktionary
Pronunciation: /həˈɹaɪ.zən/ / /həˈɹɑe.zən/ / [həˈɹɑe̯.zən]
noun
Etymology: Inherited from Middle English orisonte, orisoun, from Middle French horizon, horizonte, from Old French orisonte, orison, via Latin horizōn, from Ancient Greek ὁρίζων (horízōn), from ὅρος (hóros, “boundary”).
- The visible horizontal line (in all directions) where the sky appears to meet the earth in the distance.
“A tall building was visible on the whole sweep of the horizon.”
“The sky and sea seem to merge at the horizon.”
- The range or limit of one's knowledge, experience or interest; a boundary or threshold.
“Some students take a gap year after finishing high school to broaden their horizons.”
“With clinical researchers hard at work, a new treatment is on the horizon.”
- The range or limit of any dimension in which one exists.
“Only mortality, this irreducible and primordial horizon, that very horizon which, in Being and Time, Heidegger so compellingly revealed as the unsurpassable and defining possibility, remains.”
- A specific layer of soil, or stratum
- A cultural sub-period or level within a more encompassing time period.
- Any level line or surface.
- The point at which a computer chess algorithm stops searching for further moves.