What is Meaning of “Diwali“ and “Dhanteraj“?

Compile from various Shree Mataji speeches Refernces:- 1) 1982-1114 Diwali Puja, Wealth and Generosity, UK (Audio) 2) 1981-1101 Diwali Puja Talk, Powers of the Gruha Lakshmi, London, UK, subtitles_HIG (Video) 3) 1998-1025 Diwali Puja Talk, Novi Ligure Italy _DP CC_HIGH (Video) Lang:- English Length:- 5 min