Part of Speech: Noun

Sense: A period of fifty years.

Usage: It is commonly used to refer to a specific duration of time equal to half of a century, which is twenty-five years.

Example Sentence: She celebrated her parents' wedding anniversary that marked half a century of togetherness.

Part of Speech: Adjective

Sense: Describing something that exists, has happened, or has been in existence for fifty years.

Usage: An adjective form is used to express the age or duration of objects, buildings, organizations, or events.

Example Sentence: The museum displayed half a century old artifacts that showcased the region's rich history.

Part of Speech: Adverb

Sense: Referring to an action done for fifty years or extending over a fifty-year period.

Usage: As an adverb, it describes the extent or duration of an action that has been carried out for half a century.

Example Sentence: They have been living in that house half a century and are deeply attached to it.

Part of Speech: Idiom

Sense: Represents a long period of time, not necessarily exactly fifty years.

Usage: It is used idiomatically to denote a significant length of time, often emphasizing its duration.

Example Sentence: After working diligently, he finally achieved his dream job after half a century.