To address as thou, esp. to do so in order to treat with insolent familiarity or contempt, in rare To use the words thou and thee in discourse after the manner of the Friends, pronoun_ The second personal pronoun, in the singular number, denoting the person addressed; thyself; the pronoun which is used in addressing persons in the solemn or poetical style, Used to indicate the one being addressed, especially in a literary, liturgical, or devotional context, noun_ A thousand, especially of dollars, A unit of length equal to one-thousandth of an inch, the cardinal number that is the product of 10 and 100