«Psst.» Merriam-Webster.com Dictionary, Merriam-Webster, www.merriam-webster.com/dictionary/psst. Retrieved 11 October 2022. Subscribe to America`s largest dictionary and get thousands of other definitions and advanced searches – ad-free! Find the answers online with Practical English Usage, your go-to guide to problems in English. Find out which words work together and create more natural English with the Oxford Collocations Dictionary app. Join our community to access the latest language learning tips and assessment from Oxford University Press!.