(In the UK) a round blue sign attached to the facade of a building to commemorate its historical significance, typically giving the name of a famous or eminent person who once lived in or near the building: Robinson moved to Pinner in 1908 and his house now displays a blue plaque in his honour
More example sentences
- A blue plaque above the door announced, auspiciously enough, that Yeats had once lived there.
- A blue plaque fastened into the wall publicises the office's past as the dining room in the home of journalist Henry Morton Stanley.
- The star of films such as Alfie, Get Carter and The Italian Job was chosen by residents in Southwark to receive a blue plaque.