Hi CrystalDragon,
I would appreciate to present a reference to the kind of dictionary that says "that because it's a commonly used application of the term from those who clearly haven't read the Bible."
For what it's worth: My Bible says in Isaiah 14:12: "How you are fallen from heaven, O Lucifer, son of the morning!..."
I am sure that in view of many Bible editions out there, the name 'Lucifer' is not commonly used.
Anyway, I would argue that among many unbelievers as well as Christians the name 'Lucifer' is always being used as a reference to Satan.
God bless
Thing is, people cherry-pick that verse (well, verses 12-15) without reading the rest. If you actually read just about ALL of Isaiah 14...
3 On the day the Lord gives you relief from your suffering and turmoil and from the harsh labor forced on you,4
you will take up this taunt against the king of Babylon:
How the oppressor has come to an end!
How his fury[
a] has ended!
5 The Lord has broken the rod of the wicked,
the scepter of the rulers,
6 which in anger struck down peoples
with unceasing blows,
and in fury subdued nations
with relentless aggression.
7 All the lands are at rest and at peace;
they break into singing.
8 Even the junipers and the cedars of Lebanon
gloat over you and say,
“Now that you have been laid low,
no one comes to cut us down.”
9 The realm of the dead below is all astir
to meet you at your coming;
it rouses the spirits of the departed to greet you—
all those who were leaders in the world;
it makes them rise from their thrones—
all those who were kings over the nations.
10 They will all respond,
they will say to you,
“You also have become weak, as we are;
you have become like us.”
11 All your pomp has been brought down to the grave,
along with the noise of your harps;
maggots are spread out beneath you
and worms cover you.
12 How you have fallen from heaven,
morning star, son of the dawn!
You have been cast down to the earth,
you who once laid low the nations!
13 You said in your heart,
“I will ascend to the heavens;
I will raise my throne
above the stars of God;
I will sit enthroned on the mount of assembly,
on the utmost heights of Mount Zaphon.[
b]
14 I will ascend above the tops of the clouds;
I will make myself like the Most High.”
15 But you are brought down to the realm of the dead,
to the depths of the pit.
16 Those who see you stare at you,
they ponder your fate:
“Is this the man who shook the earth
and made kingdoms tremble,
17 the man who made the world a wilderness,
who overthrew its cities
and would not let his captives go home?”
18 All the kings of the nations lie in state,
each in his own tomb.
19 But you are cast out of your tomb
like a rejected branch;
you are covered with the slain,
with those pierced by the sword,
those who descend to the stones of the pit.
Like a corpse trampled underfoot,
20 you will not join them in burial,
for you have destroyed your land
and killed your people.
Let the offspring of the wicked
never be mentioned again.
21 Prepare a place to slaughter his children
for the sins of their ancestors;
they are not to rise to inherit the land
and cover the earth with their cities.
22 “I will rise up against them,”
declares the Lord Almighty.
“I will wipe out Babylon’s nameand survivors,
her offspring and descendants,”
declares the Lord.
If you don't just cherry-pick verses 12-15, like so many do, and actually read the surrounding verses, it's clear it's all a proverb against the arrogant king of Babylon. Nothing more.