In agricultural terms, chaff is the inedible outer husk of grains that is discarded after the valuable grain is harvested. In literature, particularly in Emily Dickinson's poem "I worked for chaff," the term is used metaphorically to represent efforts that yield little reward or substance. Dickinson contrasts chaff with wheat, suggesting that while one may labor for trivial results (chaff), the true value lies in the more substantial rewards (wheat). This duality highlights themes of worth and the nature of human endeavors.

Historically, chaff has been a significant byproduct of grain harvesting, often used as animal feed or compost. In literature, it serves as a powerful metaphor for superficiality or the transient nature of certain pursuits. Related terms include "wheat," which symbolizes value and success, and "grain," which represents the essence of worthwhile labor. When using "chaff" in writing, be mindful of its connotations of worthlessness, as it can evoke strong imagery of disappointment or futility. The term has roots in Old English, derived from "ceaf," indicating its long-standing presence in both agricultural and literary contexts.