The document defines key terms from the Model GST Law and CGST Act related to aggregate turnover, adjudicating authority, agent, business, capital goods, casual taxable person, composite supply, exempt supply, goods, input service distributor, input tax, job work, manufacture, mixed supply, non-resident taxable person, outward supply, person, place of business, place of supply, principal supply, reverse charge, supplier, works contract. It provides concise definitions for these important GST concepts in 2-3 sentences each.