An act or incidence of defecting.

plural of defection

plural of defective

deficient; imperfect

deficiency; imperfection

plural of defectibility

A person or thing considered to be defective. / (chiefly of abjad script) A word written without matres lectionis (letters indicating vowels).

(intransitive) To abandon or turn against; to cease or change one's loyalty, especially from a military organisation or political party. / (military) To desert one's army, to flee from combat.

A fault or malfunction. / The quantity or amount by which anything falls short. / (mathematics) A part by which a figure or quantity is wanting or deficient.

Having one or more defects. / (grammar, of a lexeme, especially a verb) Lacking some forms; e.g., having only one tense or being usable only in the third person.