Lixiviate \Lix*iv"i*ate\, v. t. [imp. & p. p. {Lixiviated}; p. pr. & vb. n. {Lixiviating}.] To subject to a washing process for the purpose of separating soluble material from that which is insoluble; to leach, as ashes, for the purpose of extracting the alkaline substances. [1913 Webster]