Definition

A period of five years, often used in historical or formal contexts.

Example

The project is expected to be completed in a lustrum.

Conversation

Did you know that a lustrum is a period of five years?

Really? I had no idea it had such a specific meaning.

Yeah, it's interesting how ancient cultures had their own ways of marking time, like the lustrum in Rome.

That makes sense! I wonder how they celebrated it back then.

Synonyms & Antonyms

Root Explanation

Lustrum → It originates from Latin 'lustratio' (meaning purification) and is derived from 'lustrare' (meaning to purify or to illuminate). In ancient Rome, a lustrum was a period of five years marked by a purification ceremony. Thus, it signifies a time of purification or renewal every five years.

Memory Tip

Think of the Latin word for purification ('lustrare') to remember that a lustrum is a period associated with renewal and cleansing every five years.

Visually Confused Words