Morning is defined as the first part of the day from midnight until noon.(noun)
An example of the morning is 8 a.m.
The definition of morning is used or occurring in the first part of the day.(adjective)
An example of morning used as an adjective is in the phrase "morning coffee," which means coffee that is consumed in the early part of the day.
See morning in Webster's New World College Dictionary
Origin: ME morweninge (by analogy with evening) < OE morgen, morning, akin to Ger < IE base *mer(e)k-, to glimmer, twilight > obs. Czech mrkati, to dawn, grow dark
See morning in American Heritage Dictionary 4
Origin: Middle English
Origin: , from morn, morn; see morn.
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