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In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface.
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In full terrestrial meridian: a great circle on the Earth's surface, passing through the geographic poles (the terrestrial North Pole and South Pole); also, half of such a circle extending from pole to pole, all points of which have the same longitude.
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The place on the celestial meridian where it is crossed by the sun or a star at its highest point.
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A ring or half-ring with markings in which an artificial globe is installed and may spin.
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A line passing through the poles of any sphere; a notional line on the surface of a curved or round body (in particular, an eyeball).
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(US, printing, dated) The size of type between double great primer and canon, standardized as 44-point.
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The south.
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Midday, noon.
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A midday rest; a siesta.
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A particular area or situation considered as having a specific characteristic or identity; also, the characteristics, habits, or tastes of a specific group, locale, etc.
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An alcoholic drink taken at midday.