On the commercial transportation, mostly with airlines, the baggage allowance is the amount of checked or carry-on luggage the airline will allow per passenger. On some airlines, this is the amount that is allowed free of charge.

Baggage Allowance
RAF - Baggage Allowances & Restrictions
Gulf Air increases baggage allowance
IndiGo, Jet cut baggage allowance to 15kg
Arik air offering maximum baggage allowance
Large brains exceed baggage allowance for migratory bats
RAF - Passenger Information Baggage Allowances & Restrictions
System and Method to Determine Airline Baggage Allowance and Calculate Airline Baggage Fee
A SYSTEM AND METHOD TO DETERMINE AIRLINE BAGGAGE ALLOWANCE AND CALCULATE AIRLINE BAGGAGE FEE
Clarification about permissible free baggage allowance under Baggage Rules, 1998 for the persons returning from Hong Kong Special Ad...