In this ideograph, the glyph denoting the beginning of an area is combined with a pictograph of half the sun. It is the beginning of the domain of the sun, in other words the sunrise. In context, the noun day is often a good translation.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-1664 a: Asko Parpola, B. M. Pande, and Petteri Koskikallio, 2010: Corpus of Indus Seals and Inscriptions: Volume 3,1: Page 6: New material, untraced objects, and collections outside India and Pakistan: Suomalainen Tiedeakatemia.
Image Credit:
Indus Script Sign Number 293: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.