Dictionary definition · Meridian
noun
- a town in eastern Mississippi
- the highest level or degree attainable; the highest stage of development"his landscapes were deemed the acme of beauty"
- an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator"all points on the same meridian have the same longitude"
adjective
- of or happening at noon"meridian hour"
- being at the best stage of development"our manhood's prime vigor"
Source: Open English WordNet (CC BY 4.0).