Divanü Lügati't-Türk is a significant 11th-century Turkish dictionary and linguistic work compiled by the scholar Mahmud al-Kashgari. It serves as a comprehensive resource for the Turkic languages, documenting vocabulary, grammar, and cultural insights of various Turkic tribes. The dictionary includes over 7,000 entries and provides examples of usage in poetry and proverbs. Al-Kashgari aimed to preserve the Turkic language and promote understanding among different Turkic-speaking peoples, making it an essential reference for linguists and historians studying the Turkic heritage.