RhymeZone: methylate definitions

Definitions of methylate:

verb: To add, or treat with methyl alcohol (see methylated spirits)
verb: (organic chemistry) To add a methyl group to a compound
verb: (biochemistry) To add a methyl group to a nucleic acid as part of the process of gene expression
noun: (chemistry) The anion -O-CH₃⁻ derived from methanol by loss of a proton; any salt containing this anion

(Definitions from Wiktionary)