Thou/ðaʊ/ Definition 1 of 2Pro Tip 1/3Solitary Address Used for addressing a single person, equivalent to 'you' in modern English. Thou hast a kind heart. Pro Tip 2/3Poetic Tone Often found in poetry, Shakespearean plays, and hymns to give a classical or solemn tone. Wherefore art thou Romeo? Pro Tip 3/3Religious Texts Commonly seen in older translations of the Bible and in religious literature. Thou shalt love thy neighbour.