noon

noun

ˈnün 

1

: midday

specifically : 12 o'clock at midday

2

archaic : midnight

—used chiefly in the phrase noon of night

3

: the highest point

Synonyms

• high noon
• lunch time
• midday
• noonday
• noontide
• noontime

Examples of noon in a Sentence

The party will take place from noon to 4 p.m.

He showed up at precisely 12 noon.

Recent Examples on the Web

An air quality alert was reported by the NWS Los Angeles/Oxnard CA on Wednesday at 3:59 p.m. in effect until Thursday at noon. —Ca Weather Bot, Sacramento Bee, 20 Feb. 2025

Naperville police to hold scam awareness webinar The Naperville Police Department will hold an online program on the latest scams being employed to defraud residents at noon Wednesday, Feb. 26. —Michelle Mullins, Chicago Tribune, 19 Feb. 2025

General-sale tickets will be available beginning Friday at noon ET at beyonce.com. —Caché McClay, USA TODAY, 19 Feb. 2025

Our Monthly Meeting is set to be kick off at noon ET Thursday. —Paulina Likos, CNBC, 19 Feb. 2025

Word History

Etymology

Middle English, from Old English nōn ninth hour from sunrise, from Latin nona, from feminine of nonus ninth; akin to Latin novem nine — more at nine

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing noon

• high noon
• morning, noon, and night
• pre-noon

Rhymes for noon

• boon
• brune
• coon
• croon
• dune
• goon
• hewn
• hoon
• june
• loon
• moon
• poon

Kids Definition

noon

noun

ˈnün 

: the middle of the day : 12 o'clock in the daytime

noon adjective

Etymology

Old English nōn "ninth hour from sunrise," derived from Latin nona, a feminine form of nonus "ninth," from novem "nine"

Word Origin

Noon has not always meant "12 o'clock in the daytime." In the ancient Roman way of keeping track of time, the hours of the day were counted from sunrise to sunset. The ninth hour of their day (about 3 p.m. nowadays) was called nona, Latin for "ninth." In the early period of English, the word was borrowed as nōn, also referring to the ninth hour after sunrise. By the 14th century, however, the word came to be used for midday, 12 o'clock, as we use it today.