Vernacular/vərˈnækjələr/ Definition 1 of 3Pro Tip 1/3Cultural Identity Vernacular reflects the unique culture and identity of a group or region. He writes poems in the vernacular to celebrate his heritage. Pro Tip 2/3Contrast With Standard Vernacular may differ greatly from the standard language of a country. Tourists often struggle with the local vernacular. Pro Tip 3/3Informal Communication Vernacular is informal and may not be suitable for formal occasions. Avoid using vernacular in academic essays.