deletion

(noun) any process whereby sounds or words are left out of spoken words or phrases. Synonyms: omission.

(noun) (genetics) the loss or absence of one or more nucleotides from a chromosome.

(noun) the omission that is made when an editorial change shortens a written passage. Synonyms: excision, cut. Examples: "An editor's deletions frequently upset young authors." "Both parties agreed on the excision of the proposed clause."

(noun) the act of deleting something written or printed.