from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Without deceit or trickery; straightforward.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Alternative form of above-board.
from the GNU version of the Collaborative International Dictionary of English
- adv. Above the board or table. Hence: in open sight; without trick, concealment, or deception.
from The Century Dictionary and Cyclopedia
- In open sight; without tricks or disguise: as, an honest man deals aboveboard; his actions are open and aboveboard.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. without concealment or deception; honest
- adv. in an honest manner
Originally a gambling term referring to the fact that a gambler whose hands were above the board or gaming table could not engage in trickery, such as changing cards, below the table.(American Heritage® Dictionary of the English Language, Fourth Edition)