1) "head-quarters" in a Roman camp, the tent of the commander-in-chief
2) the palace in which the governor or procurator of a province resided, to which use the Romans were accustomed to appropriate the palaces already existing, and formerly dwelt in by kings or princes; at Jerusalem it was a magnificent palace which Herod the Great had built for himself, and which the Roman procurators seemed to have occupied whenever they came from Caesarea to Jerusalem to transact public business
3) the camp of the Praetorian soldiers established by Tiberius
Part of Speech: noun neuter
Of Latin origin; the praetorium or governor's court room (sometimes including the whole edifice and camp): - (common, judgment) hall (of judgment), palace, praetorium.
|b palace guard||55.12|
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root πραιτώριον; click on the second column to search for that grammatical form of the root πραιτώριον; click on the third column to search for that word and grammatical form; click on the total to search for the root πραιτώριον.