O'clock

Definition

O'clock is primarily used as an adverb to indicate the exact hour when telling time. It represents a full hour and is derived from the phrase "of the clock."

Parts of Speech

• Adverb

Pronunciation

American English

• IPA Pronunciation: /əˈklɑːk/
• Respelling: uh-KLAHK

British English

• IPA Pronunciation: /əˈklɒk/
• Respelling: uh-KLOK

Etymology

The term "o'clock" evolved from the Middle English phrase "of the clock," which was used to specify time as indicated by mechanical clocks, distinguishing it from other methods of timekeeping like sundials.

Derivatives

• None (standalone term)

Synonyms

• At the hour
• Precisely
• Sharp (informal)

Antonyms

• None

Usage

The term "o'clock" is commonly used in everyday language to specify the time of day, especially when referring to a full hour. For example, "The train departs at six o'clock," or "Dinner will be served at eight o'clock sharp."

Related Terms

• Hour: A unit of time equivalent to 60 minutes.
• Clock: A device used for measuring and indicating time.
• Time: The indefinite continued progress of existence and events.

Detailed Definitions

Adverb

• Used to indicate the exact hour of the day:
  • Example: "The meeting is scheduled for 10 o'clock."
• Used informally to emphasize precision in time:
  • Example: "Be ready by eight o'clock sharp."