King James Bible Dictionary

The refuse of winnowed corn. It was usually burned (Exodus 15:7; Isaiah 5:24; Matthew 3:12). This word sometimes, however, means dried grass or hay (Isaiah 5:24; 33:11). Chaff is used as a figure of abortive wickedness (Psalms 1:4; Matthew 3:12). False doctrines are also called chaff (Jeremiah 23:28), or more correctly rendered "chopped straw." The destruction of the wicked, and their powerlessness, are likened to the carrying away of chaff by the wind (Isaiah 17:13; Hosea 13:3; Zephaniah 2:2).

General references
Jeremiah 23:28

Figurative
Job 21:18; Psalms 1:4; Psalms 35:5; Isaiah 5:24; Isaiah 17:13; Daniel 2:35; Hosea 13:3; Matthew 3:12; Luke 3:17

the husk of corn or wheat which was separated from the grain by being thrown into the air, the wind blowing away the chaff, while the grain was saved. The carrying away of chaff by the wind is an ordinary scriptural image of the destruction of the wicked and of their powerlessness to resist God's judgments. (Psalms 1:4; Isaiah 17:13; Hosea 13:3; Zephaniah 2:2)

CHAFF, noun

1. The husk, or dry calyx of corn, and grasses. In common language, the word is applied to the husks when separated from the corn by thrashing, riddling or winnowing. The word is sometimes used rather improperly to denote straw cut small for the food of cattle.

2. Refuse; worthless matter; especially that which is light, and apt to be driven by the wind. In scripture, false doctrines, fruitless designs, hypocrites and ungodly men are compared to chaff Psalms 1:4; Jeremiah 23:28; Isaiah 33:11; Matthew 3:12.

CHAFFER, verb intransitive To treat about a purchase; to bargain; to haggle; to negotiate; to chop and change; as, to chaffer for preferments.

CHAFFER, verb transitive To buy; to exchange.

CHAFFER, noun One who chaffers; a bargainer; a buyer.

CHAFFERN, noun A vessel for heating water.

CHAFFERY, noun Trafick; buying and selling.

CHAFFINCH, noun A species of birds of the genus Fringilla, which are said to delight in chaff, and are admired for their song.

CHAFFLESS, noun Without chaff.

CHAFFWEED, noun A plant, cud-weed, a species of Gnaphalium; but this name is given also to the Centunculus.

CHAFFY, adjective Like chaff; full of chaff; light; as, chaffy straws; chaffy opinions.