floodgate

/ˈflʌdˌɡeɪt/
noun
  1. A gate that controls the flow of water, especially in a dam or canal, used to prevent flooding or to release water.
    • A broken floodgate caused the canal to overflow into the nearby fields.
    • During the storm, the floodgate held back the rising river to protect the town.
    • The engineers opened the floodgate to release excess water from the reservoir.
  2. Something that releases or allows a sudden, large flow of something (such as emotions, information, or activity).
    • The movie's sad ending opened the floodgates of tears for the audience.
    • The new law opened the floodgates for thousands of new business applications.
    • Her apology opened the floodgates of criticism from the public.
Synonyms
What does "floodgate" mean? | whatsthatwordmean | whatsthatwordmean