Hiatus has multiple meanings depending on the context. Here are some definitions:

• In phonology, hiatus or diaeresis describes the occurrence of two separate vowel sounds in adjacent syllables with no intervening consonant. When two vowel sounds instead occur together as part of a single syllable, the result is called a diphthong.
• In general, hiatus means a break or interruption in the continuity of something, such as a work, series, action, etc. .
• Hiatus can also refer to a pause in which nothing happens or a gap where something is missing.
• In anatomy, a hiatus is an opening, such as the opening in the diaphragm leading into the chest cavity.
• In linguistics, hiatus refers to a slight pause in pronunciation between two successive vowels in adjacent words or syllables.

Examples of how hiatus is used in sentences:

• The band is making an album again after a five-year hiatus.
• The company expects to resume production of the vehicle again after a two-month hiatus.
• When there is an unusually wide opening in the diaphragm, there can be a hiatus (or hiatal) hernia.
• Scholars attempted to account for the hiatus in the medieval manuscript.

In summary, hiatus can refer to a break, pause, or interruption in various contexts, such as phonology, anatomy, and linguistics.