Prohibit/prəʊˈhɪbɪt/ Definition 1 of 3Pro Tip 1/3Spatial Context Used to describe physical spaces where specific actions are not allowed. The museum prohibits flash photography. Pro Tip 2/3Authority and Rules 'Prohibit' often implies that a rule or regulation is backed by an authority. The new policy prohibits employees from using social media at work. Pro Tip 3/3Common Collocations Pairs often with 'smoking,' 'weapons,' or 'cellphones' in institutional settings. This restaurant prohibits bringing in outside food or drinks.