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Vine's Expository Dictionary of NT Words [1]

1: Ἥττημα (Strong'S #2275 — Noun Neuter — hettema — hayt'-tay-mah )

primarily "a lessening, a decrease, diminution," denotes "a loss." It is used of the "loss" sustained by the Jewish nation in that they had rejected God's testimonies and His Son and the Gospel,  Romans 11:12 , the reference being not only to national diminution but to spiritual "loss;" RV, "loss," for AV, "diminishing." Here the contrasting word is pleroma, "fullness." In  1—Corinthians 6:7 the reference is to the spiritual "loss" sustained by the church at Corinth because or their discord and their litigious ways in appealing to the world's judges. Here the RV has "defect" (marg. "loss"), for AV, "fault." The preceding adverb "altogether" shows the comprehensiveness of the "defect;" the "loss" affected the whole church, and was "an utter detriment."

 Isaiah 31:8DiminishingFaultLoss. 2—Peter 2:20

King James Dictionary [2]

Defect n. L. To fail to make or do.

1. Want or absence of something necessary or useful towards perfection fault imperfection.

Errors have been corrected, and defects supplied.

We say, there are numerous defects in the plan, or in the work, or in the execution.

2. Failing fault mistake imperfection in moral conduct, or in judgment.

A deep conviction of the defects of our lives tends to make us humble.

Trust not yourself but, your defects to know,

Make use of every friend and every foe.

3. Any want, or imperfection, in natural objects the absence of any thing necessary to perfection any thing unnatural or misplaced blemish deformity. We speak of a defect in the organs of seeing or hearing, or in a limb a defect in timber a defect in an instrument, &c.

DEFECT, To be deficient.

Webster's Dictionary [3]

(1): ( v. i.) To fail; to become deficient.

(2): ( n.) Want or absence of something necessary for completeness or perfection; deficiency; - opposed to superfluity.

(3): ( n.) Failing; fault; imperfection, whether physical or moral; blemish; as, a defect in the ear or eye; a defect in timber or iron; a defect of memory or judgment.

(4): ( v. t.) To injure; to damage.