burglar UK /ˈbɜːɡlə(ɹ)/US /ˈbɝɡlɚ/noun 1verb 1forms 3phrases 1 noun1 •A person who breaks in to premises with the intent of committing a crime, usually theft.The burglar made off with a large diamond from the museum. verb1 •To commit burglary.The latter, with another constable, remained to watch the burglared premises both back and front, […] — 1901 formsburglared · burglaring · burglars Phrases with burglar time burglarSomething or someone that consumes an inordinate amount of time, especially without achieving anything productive.