1 : the absence of a section of genetic material from a gene or chromosome 2 : the mutational process that results in a deletion

DELETION definition: an act or instance of deleting. See examples of deletion used in a sentence.

Definition of deletion noun from the Oxford Advanced Learner's Dictionary. deletion (to something) the act of removing something that has been written or printed, or that has been stored on a computer; …

A deletion is also the loss of part of a chromosome (= structure containing the information that controls what plants and animals are like), or the chromosome that results from such a loss.

5 days ago · A deletion, as related to genomics, is a type of mutation that involves the loss of one or more nucleotides from a segment of DNA. A deletion can involve the loss of any number of …

Define deletion. deletion synonyms, deletion pronunciation, deletion translation, English dictionary definition of deletion. n. 1. The act of deleting; removal by striking out. 2. Material, such as a word or …

They allow users to manage their preferences and consent, access their personal data, and request data deletion.

deletion, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

In genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) (sign: Δ) is a mutation (a genetic aberration) in which a part of a chromosome or a sequence of DNA is left out during DNA …

Jan 18, 2026 · deletion (countable and uncountable, plural deletions) An item that has been or will be deleted. [1580s[1]] The act of deleting. [c. 1600[1]]