The word "naught" is an archaic term that is still occasionally used in modern English, particularly in literature, poetry, and formal settings. It has various meanings depending on the context, but the most common definition is "nothing."

Explanation:

1. Definition of "naught":
- The word "naught" is derived from the Old English word "nāwiht," which means "nothing." It is often used to express the absence or lack of something.
- In this context, "naught" is synonymous with "zero," "nil," or "void."

2. Example usages:
- "All his efforts were in vain, for he achieved naught."
- "She searched the entire house but found naught."
- "The teacher scolded the students for their naughtiness."

3. Alternative meanings:
- "Naught" can also refer to a knot or tangle, particularly in the context of sailing or ropes. However, this usage is less common and more archaic.
- Additionally, "naught" can be used to describe someone or something as mischievous or naughty, similar to the word "naughty." This usage is also less common nowadays.

4. Synonyms and related words:
- Synonyms for "naught" include "nothing," "zero," "nil," "void," "nought," and "zip."
- Antonyms for "naught" include "something," "anything," and "everything."

In conclusion, the word "naught" primarily means "nothing" in modern English. While it can also have other meanings, such as a knot or mischievous behavior, these usages are less common.