"write or print in capital letters," 1764, from capital (n.1) + -ize. The meaning "convert (assets) to capital" is recorded from 1868, from capital (n.2). Related: Capitalized; capitalizing.
chiefly British English spelling of capitalize (q.v.). For suffix, see -ize. Related: Capitalised; capitalising.
1860, "act of converting (assets) to capital," noun of action from capitalize in the financial sense. The meaning "act of writing or printing in capital letters" is recorded from 1847, from the writing sense.