* A misspelling of another word, like "doldrums" or "dawdler."
* A regional dialect word or slang term that isn't widely known.
* A made-up word for a specific context.
To understand what "dallard" might mean, you need more context. For example:
* Where did you encounter the word? Was it in a book, a conversation, or online?
* What was the surrounding text or conversation? This might give clues about the intended meaning.
Please provide more information so I can help you decipher the meaning of "dallard."