Well lets look at it!
1a: expressing or dealing with facts or conditions as perceived without distortion by personal feelings, prejudices, or interpretations
2a: of, relating to, or being an object, phenomenon, or condition in the realm of sensible experience independent of individual thought and perceptible by all observers : having reality independent of the mind.
d: relating to or existing as an object of thought without consideration of independent existence —used chiefly in medieval philosophy
It should be obvious to anyone with a brain that "objective" is nothing more than an aspiration, since it is not possible to achieve it, unless you are god. Maybe not even then.
1a
Since facts can only reside in the mind, and be "dealt" with by human subjects it cannot be possible with all surety to eliminate personal "distortions". The term "as perceived" brings with it a host of problems.
2a
This is a little more promising. The idea that there can be things that exist independently outside the human mind and separate from the human body is appealing. In fact it is a thing we take for granted everyday. The object in the view of my camera, the car I am about to enter.
We can get others to agree these things exist and are objects in the world.
So far so good.
But though we can agree that these things exist, there is nothing to say that they all have the same meaning for us. And when we start to use terms like phenomena to describe the objects of the world "objectivity" breaks down. Witness statements show that the most basic facts of our perception are coloured and filled-in by our prejudices. It's all very well if the object is a white cube in white light, but descriptions of even that can break down when adjectives are employed to describe it.
Objectivity is an aspiration that requires agreement.
d.
Medieval says it all.
When it comes to had objects in the world agreement should be easy enough.
The big trouble comes when so foo comes along and tries to apply the term "objective" to morality. This shows two tendencies; an ignorance of the implications of the sensible world and the fact that there are other people in it; and a total narcissistic world view, arrogant and insensible of the rest of humanity.
Any criticism that everyone should follow a strict set of moral guidelines is usually followed by a lot of foot stamping, unless they have power and what follows often has something to do with marching and book burning followed by exterminations.