at once

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at once

He raised both hands at once to catch the ball.

Definition

Adverb 1. Immediately, without any delay: Used to indicate that something should happen or be done right now, instantly. 2. Simultaneously, at the same time: Used to indicate that two or more actions or events occur together.

Usage

The phrase "at once" is used to convey urgency for immediate action or to describe concurrent events. It is formal and emphatic. - To command or request immediate action: You must leave at once. - To describe simultaneous occurrence: She felt happy and sad at once.

Examples
  • Meaning: Immediately
    • The manager demanded to see the report at once.
    • Stop that noise at once!
  • Meaning: Simultaneously
    • He was at once a stern teacher and a kind mentor.
    • The audience laughed and cried at once during the powerful performance.
Advanced Usage
  • "all at once": This variant can mean "suddenly" or "all together at the same time."
    • All at once, the lights went out. (Suddenly)
    • The questions came all at once, overwhelming the speaker. (All together simultaneously)
Variants and Related Words
  • Immediately (adv): Without any delay.
  • Straightaway (adv): At once; immediately.
  • Forthwith (adv, formal): Immediately; without delay.
  • Simultaneously (adv): At the same time.
Synonyms
  • Instantly: At once; immediately.
  • Right away: Without delay.
  • Concurrently: Happening at the same time.
Related Phrases
  • At one time: This phrase has a different meaning, typically referring to a period in the past (e.g., ). Do not confuse it with "at once."
at once

He raised both hands at once to catch the ball.

Adverb
  1. simultaneously
    • he took three cookies at a time
  2. without delay or hesitation; with no time intervening
    • he answered immediately
    • found an answer straightaway
    • an official accused of dishonesty should be suspended forthwith
    • Come here now!

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