An NRO Account is designed for NRIs to handle income earned in India, like rent, dividends, pensions and interest from fixed deposits. It also allows you to deposit funds in Indian rupees. However, keep in mind that the money in an NRO account isn't easily transferable abroad unless you follow the authorised remittance procedures.
Outward remittance refers to the process of sending money from India (from your NRO account) to someone overseas. Whether that's a foreign bank account or your own account abroad. You need to ensure that you have the necessary regulatory approvals and documentation.