- symbol a measure of money supply, including coins and notes and personal money in current and deposit accounts
- symbol a measure of money supply which includes M1 and personal money in deposit accounts (in the USA, only deposits of less than $100,000 are included)
- An acronym for a monetary aggregate of an economy's money supply which includes the M1 aggregate. The U.S. Federal Reserve defines M2 as the M1 component plus time and savings deposits, individual money market account balances and overnight repurchase agreements. The EC B defines M2 as M1 plus deposits that mature within two years and redeemable deposits that can be called within three months.