What is Individual Retirement Account?

Legal Definition
An individual retirement account or IRA is a form of "individual retirement plan", provided by many financial institutions, that provides tax advantages for retirement savings in the United States. An individual retirement account is a type of "individual retirement arrangement" as described in IRS Publication 590, individual retirement arrangements (IRAs). The term IRA, used to describe both individual retirement accounts and the broader category of individual retirement arrangements, encompasses an individual retirement account; a trust or custodial account set up for the exclusive benefit of taxpayers or their beneficiaries; and an individual retirement annuity, by which the taxpayers purchase an annuity contract or an endowment contract from a life insurance company.

As of 2010, low savings rates, financial crises, and poor stock market performance had caused retirement savings account values to fall so low that 75% of Americans nearing retirement age had less than $30,000 in their retirement accounts, which Forbes called "the greatest retirement crisis in American history."
-- Wikipedia
Legal Definition
a plan for retirement where money is put aside in a tax free account.