In this symbol, the adjective large is placed over a point of light, which represents the existence of something. Hence, this symbol indicates the superior size of something. The symbol is related to the Chinese character tài 太. Definitions include the adjectives superior and bigger, and the adverb too.
Illustrative Text References:
Too: Mohenjo-daro: Seal: M-123 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 42: Collections in India: Suomalainen Tiedeakatemia.
Bigger: Mohenjo-daro: Seal: M-980 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 95: Collections in Pakistan: Suomalainen Tiedeakatemia.
Image Credit:
Indus Script Sign Number 3: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.