pronoun, singular, nominative thou; possessive thy or thine; objective thee; plural, nominative you or ye; possessive your or yours; objective you or ye.
- Archaic except in some elevated or ecclesiastical prose. the personal pronoun of the second person singular in the nominative case (used to denote the person or thing addressed): Thou shalt not kill.
- (used by the Friends) a familiar form of address of the second person singular.
verb (used with object)
- to address as “thou.”
verb (used without object)
- to use “thou” in discourse.
noun, plural thous, (as after a numeral) thou. Slang.
- one thousand dollars, pounds, etc.
- archaic, dialect refers to the person addressed: used mainly in familiar address or to a younger person or inferior
- (usually capital) refers to God when addressed in prayer, etc
noun plural thous or thou
- one thousandth of an inch. 1 thou is equal to 0.0254 millimetre
- informal short for thousand
pron.2nd nominative singular personal pronoun, Old English þu, from Proto-Germanic *thu (cf. Old Frisian thu, Middle Dutch and Middle Low German du, Old High German and German du, Old Norse þu, Gothic þu), from PIE *tu-, second person singular pronoun (cf. Latin tu, Irish tu, Welsh ti, Greek su, Lithuanian tu, Old Church Slavonic ty, Sanskrit twa-m). Superseded in Middle English by plural form you (from a different root), but retained in certain dialects (e.g. Philadelphia Quakers). The plural at first was used in addressing superior individuals, later also (to err on the side of propriety) strangers, and ultimately all equals. By c.1450 the use of thou to address inferiors gave it a tinge of insult unless addressed by parents to children, or intimates to one another. Hence the verb meaning “to use ‘thou’ to a person” (mid-15c.). Avaunt, caitiff, dost thou thou me! I am come of good kin, I tell thee! [“Hickscorner,” c.1530] A brief history of the second person pronoun in English can be found here.