high net worth individual ˌhigh ˌnet worth indiˈvidual abbreviation HNWI noun [countable] JOURNALISM
a very rich person:
• High net worth individuals increasingly turn to their private banks for corporate finance advice.
* * *
high net worth individual UK US noun [C] (ABBREVIATION HNWI) FINANCE
► used by financial organizations to talk about a client or possible client who is very rich: »
The bank is the latest financial institution seeking to cater to wealthy individuals in Chicago, the nation's third-biggest market for high net worth individuals.
Financial and business terms. 2012.