The term alas may refer to—

• an interjection used to express regret, sorrow, grief, sympathy, or apprehension of danger or evil.
• in geomorphology, a steep-sided depression formed by the melting of permafrost; it may contain a lake.
• in zoology, a wing or winglike body part.
• Alas (East Timor), a subdistrict of the district Manufahi in East Timor.
• Alas!, a work of literature by Rhoda Broughton.
• AlAs, aluminium arsenide
• ALAS, a small Colombian political party mainly based in the city of Valledupar.
• the Spanish writer Leopoldo Alas y Ureña

Landforms