Dictionary.com
Thesaurus.com

sound effect

American  
[sound i-fekt] / ˈsaʊnd ɪˌfɛkt /

noun

  1. any sound, other than music or speech, artificially reproduced to create an effect in a dramatic presentation, as the sound of a storm or a creaking door. SFX


sound effect British  

noun

  1. any sound artificially produced, reproduced from a recording, etc, to create a theatrical effect, such as the bringing together of two halves of a hollow coconut shell to simulate a horse's gallop; used in plays, films, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sound effect

First recorded in 1925–30

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

At that point, sound effects beep to signal the start of a new game.

From The Wall Street Journal

There are few scenic accouterments other than some fabulously eerie lighting, suspenseful sound effects and heavy-handed underscoring.

From Los Angeles Times

Early last month, a new model of the tool was released that can generate videos with speech, sound effects and ambient sounds, marking another advancement in the company’s AI efforts.

From The Wall Street Journal

In others, it is about the drama and suspense of a well-told tale, or riveting sound effects.

From The Wall Street Journal

Later, John and Paul attempt diabolical accents while relating the story of Count Balder and Felpin Mansions, “the eccentric son of Baron Landsberg, the inventor of the rack,” including a variety of sound effects.

From Salon