Meaning: A remark or statement, especially one with a moral content, that has been used too often to be interesting or thoughtful.
Synonyms: Cliche, truism, commonplace, bromide, inanity, old chestnut, banality.
In Hindi: साधारण बात, तुच्छता
Use: Because I have heard your platitude a hundred times, it means nothing to me now.
When my teacher tried to motivate me by using a platitude I had already heard before, I yawned in her face.