Definitions:

1. Having an unhappy, gloomy, or sad expression. ADJECTIVE
   • He's been walking around with a long face ever since he failed the examination.
   • The long-faced expression on the child's face after losing his balloon was heartbreakingly sincere.
2. Typically describes someone with a facial structure that is noticeably longer than it is wide, giving the face an elongated appearance. ADJECTIVE
   • Her long-faced silhouette was distinctive, often making her the subject of portrait artists at the park.

Synonyms:

• bleak
• dejected look
• depressed
• disheartened
• dismal
• dispirited
• downcast
• frown
• gloom
• glumness
• sad face
• sullen look