1. makes something crude, coarse, or lacking in refinement
Usage: British spelling; third person singular present
2. makes something widely known or accessible to the general public, often in a simplified form
Usage: British spelling; third person singular present

Examples

• The tabloid vulgarises serious news stories with sensational headlines.
• She believes that reality television vulgarises popular culture.
• The professor vulgarises complex theories to make them accessible to students.
• Mass production often vulgarises traditional crafts.
• The documentary vulgarises scientific concepts for general audiences.
• Critics argue that social media vulgarises political discourse.