illiquid Syllabification: (il·liq·uid)Pronunciation: /i(l)ˈlikwid/Definition of illiquid adjective (of assets) not easily converted into cash:illiquid assets (of a market) with few participants and a low volume of activity. Derivatives illiquidityPronunciation: /ˌi(l)liˈkwiditē/ noun illiquid in other Oxford dictionaries Definition of illiquid in the British & World English dictionary