声门塞音为声门闭塞形成的辅音，亦称「清喉塞音」。它在国际音标中的符号是⟨ʔ⟩，在X-SAMPA中的符号是⟨?⟩。

声门塞音的特征有：

• 发音方法是闭塞，即是通过阻碍空气在声腔流动来发音。
• 发音部位是声门，通过声门闭塞而发音。
• 发声类型是清音，意味着发音时声带并不颤动。
• 本辅音是口腔辅音，表示发声时空气只从口中流出。
• 发音不涉及舌头等口内器官的运动。
• 气流特点是从肺部直接流出，而不是从口腔或声门流出。

The glottal stop is a type of consonantal sound used in many spoken languages, produced by obstructing airflow in the vocal tract or, more precisely, the glottis. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ʔ⟩.

In English, the glottal stop is represented, for example, by the hyphen in uh-oh!. For most United States English speakers, a glottal stop is used as an allophone of /t/ between a vowel and "m" (as in atmosphere or Batman) or a syllabic "n" (as in button or mountain), except when talking slowly. In British English, the glottal stop is most familiar in the Cockney pronunciation of "butter" as "bu'er".