In English:
Sutra in English : Yajna = Benevolent Act
Swami Dayanand Saraswati Commentary : The one which is from ‘Agnihotra’ = Fire-oblation to ‘Ashwamedha’, and which is the conduct of architecture/technology, and material science, is done for the benevolence of the world, is called ‘Yajna = Benevolent Act’.
In Hindi:
महर्षि दयानन्द व्याख्या : जो अग्निहोत्र से लेकर अश्वमेध पर्यन्त, वा जो शिल्प व्यवहार और पदार्थ विज्ञान है जो कि जगत् के उपकार के लिए किया जाता है, उसको 'यज्ञ' कहते हैं ।