Oho/əʊˈhəʊ/ Definition 1 of 1Pro Tip 1/3Expression of Surprise Used when something unexpected happens or is discovered. Oho, what have we found here? Pro Tip 2/3Discovering Secrets Often used when uncovering something hidden or secretive. Oho, this is where you've been hiding! Pro Tip 3/3Casual Conversations Fits best in informal settings amongst friends or family. Oho, look who decided to show up!