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.

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.

Definition of deletion noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

2 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 …

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

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 …

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 …

Nov 1, 2025 · deletion (countable and uncountable, plural deletions) An item that has been or will be deleted. [1580s[1]] The act of deleting. [c. 1600[1]]