Objective

Objective, a philosophical term used to denote that which is true universally apart from all merely private sense or judgment, and finds response in the universal reason, the reason that is common to all rational beings; it is opposed to subjective, or agreeable to one's mere feelings or fancy.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Obi * Oblates
Oases
Oates, Titus
Obadiah
Oban
Obeid
Obelisk
Ober-Ammergau
Oberlin, Jean Friedrich
Oberon
Obi
Objective
Oblates
Oboe
Obelus
O'Brien, William
O'Brien, William Smith
Obscurantist
Obsidian
Occam
Occasionalism
Oceania