instantaneous
1 synonym and 5 antonyms for instantaneous, grouped by meaning and by how common each one is.
Adj — Happening so fast it seems to occur at once, with no noticeable delay.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Antonyms
How to use instantaneous
The word patterns that sound natural to a native speaker.
instantaneous reaction
instantaneous effect
nearly instantaneous
More formal and technical-sounding than "instant" — common in science and engineering writing.
Etymology
From New Latin instantaneus, built on the same Latin root as instant.
Full origin of instantaneous →Frequently asked questions
What does “instantaneous” mean?
The word “instantaneous” means happening so fast it seems to occur at once, with no noticeable delay. In plain terms, occurring in essentially zero time.
How do you pronounce “instantaneous”?
“Instantaneous” is pronounced ihns-tuhn-TAY-nee-uhs (/ɪnstənˈteɪni.əs/ in IPA).
How do you use “instantaneous” in a sentence?
Here is “instantaneous” used in a sentence: “The camera flash and the shutter click were almost instantaneous.”
What is the opposite of “instantaneous”?
The opposite of “instantaneous” — its antonyms — are delayed, gradual, nonimmediate, noninstantaneous and slow.
What part of speech is “instantaneous”?
“Instantaneous” is an adjective.
Where does the word “instantaneous” come from?
The word “instantaneous” comes from New Latin. From New Latin instantaneus, built on the same Latin root as instant.
Is “instantaneous” a common word?
“Instantaneous” is an uncommon word in modern English, usually learned at around the C2 level.
