vedyog.net

In English:

Swami Dayanand Saraswati Commentary : The one who does not have any fixed date for his coming and going; and who, being an intellectual, travels everywhere and does welfare to all living beings by advising through questions and answers, is called ‘Guest’.

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In Hindi:

महर्षि दयानन्द व्याख्या : जिसकी आने और जाने में कोई भी निश्चित तिथि न हो, तथा जो विद्वान होकर सर्वत्र भ्रमण कर के प्रश्नोत्तरों के उपदेश से सब जीवों का उपकार करता है, उसको 'अतिथि' कहते हैं ।