1. banking(n = noun.act) - engaging in the business of keeping money for savings and checking accounts or for exchange or for issuing loans and credit etc.;
Derived form verb bank5
2. banking(n = noun.act) - transacting business with a bank; depositing or withdrawing funds or requesting a loan etc.;
Derived form verb bank3, verb bank6
The business of a bank or of a banker. [1913 Webster]
banking, n. the business transactions of a bank.