Make sure the post is 'square' to the floor. [=make sure that there is a right angle where the post and the floor meet]
I'll go on the trip if I can 'square it with' my parents. [=if my parents will agree to let me go]
Here's the rest of the money. Now we're 'square'. [=now we don't owe each other anything]
(..) ox on your ring. you're the secret head of the Temple of the Four Orders in who's headquarters we now sit. Located, north-west corner St. James square I think That's the mystery, the only mystery is to why you bothered to blind fold me at all. Yes... well, standard procedure I suppose. (..)2009 Sherlock Holmes