Initial coin offering definition is - the first sale of a cryptocurrency to the public conducted for the purpose of raising funds (as to support a start-up) —called also ICO. How to use initial coin offering in a sentence. Forget an IPO, Coin Offerings Are New Road to Startup Riches Forget an IPO, Coin Offerings Are New Road to Startup Riches New, unregulated fundraising method is based in world of cryptocurrencies. By. Paul Vigna. Paul Vigna. The Wall Street Journal.