1. Without concealment or deception; honest
   "their business was open and aboveboard"
   - straightforward

1. In an honest manner
   "was known for dealing aboveboard in everything"
   - honestly

See also: square, straight

• objurgate
• objurgation
• objurgatory
• oblanceolate
• oblanceolate leaf
• oblast
• oblate
• oblateness
• oblation
• obligate
• obligate anaerobe
• obligated
• obligation
• obligational
• obligato
• obligatorily
• obligatory
• oblige
• obliged
• obligee
• obliger
• obliging
• police constable
• police court
• police cruiser