Wiktionary
n. (alternative spelling of boggard English)
Wikipedia
Boggart is one of numerous related terms used in English folklore for either a household spirit or a malevolent genius loci inhabiting fields, marshes or other topographical features. Other names of this group include bug, bugbear, bogey, bogeyman, bogle, etc., presumably all derived from (or related to) Old English pūcel, Irish púca and Welsh bwg with the same meaning (itself a probable loan from the English bug).
The household form causes mischief and things to disappear, milk to sour, and dogs to go lame. The boggarts inhabiting marshes or holes in the ground are often attributed more serious evil doing, such as the abduction of children.
In the Dungeons & Dragons fantasy role-playing game, the boggart is a type of fictional monster.
Usage examples of "boggart".
But the boggart was spluttering and stamping his feet before I was half through.
He hit the boggart like a bolt of black lightning out of that storm, landing on his shoulders with all four sets of claws out and busy.
Again it struck me that the boggart seemed more frightened of her than he was of Mister Cat.
The Persian was as gone as the boggart, but Mister Cat was sitting between us, tail curled around his feet, looking utterly bored and sleepy.
I told her what happened with the boggart and the cats, she got very quiet for a while.
And if she was the servant, the way the boggart had said, then those other two were probably up there, too.
Were you bugging the workmen, too, like the boggart and the rest of them?
He was about the same size as the boggart, but slighter, not as burly.
If there should be a boggart in New York, he will find your house, I assure you, as any pooka in London will know your name.
Sergeant, about the nature of the, ah, boggart, which you destroyed with such expedition.
And a snake with the body of a boggart, though none so bad as the one old Hawk bombarded!
He saw red, and the boggart hidden deep inside him came to sudden life.
We will send these Twilight folk back to their boggart hills with something to think about.
The standard boggart pit is six feet deep but for a ripper, the most dangerous boggart of all, nine feet is the norm.
After splitting the floor, the boggart had caught the old priest by his foot and dragged his leg down into the ground almost as far as his knee.