The word sena literally means army in many South Asian languages.

Sena could refer to

• the Shiv Sena, a political party in India
• American movie director Dominic Sena (b. 1949)

Also,

• the Bharatiya Vayu Sena (Bharatiya = Indian, Vayu = Air) refers to the Indian Air Force
• the Bharatiya Nau Sena refers to the Indian Navy
• the Bharatiya Thal Sena refers to the Indian Army