Here are some possibilities:
1. A sound with a short duration: This is the most basic definition. It's simply a sound that lasts for a short amount of time, like a click, a snap, or a cough.
2. A sound with a short vowel: In language, a "short sound" can refer to a vowel that is pronounced quickly and without stretching. For example, the vowel in "cat" is considered a short vowel, while the vowel in "cake" is considered a long vowel.
3. A sound with a high pitch: In music, a "short sound" could refer to a sound that is high pitched, like a bird's chirp or a bell.
4. A specific sound effect: Sometimes "short sound" is used to refer to a particular sound effect used in film, music, or video games, such as a "boing" sound or a "zap" sound.
To understand what "short sound" means, you'll need to consider the context in which it's used.
Can you give me more information about where you heard the term "short sound"?