/euh buv"bawrd', -bohrd'/ , adv. , adj.
in open sight; without tricks, concealment, or disguise: Their actions are open and aboveboard.
[ 1610-20; ABOVE + BOARD; so called from the requirement of keeping the hands above the table or board in order to discourage possible cheating at cards ]
Syn . honest, straightforward.
Ant . devious, underhanded, sneaky.