What does "Sorry for being dense." mean?
Hello all!

The expression "Sorry for being dense." has the same meaning as "Sorry for being stupid." or "Sorry for my ignorance."?
Can I use it in a formal conversation?

One more question :
What the difference among :
- Sorry for being dense.
- Sorry to be dense.
- Sorry to seem dense.
Could you please give some examples?

Thanks for helping me. :)

Question

What does  "Sorry for being dense." mean?
Hello all!
 
The expression "Sorry for being dense." has the same meaning as "Sorry for being stupid."  or "Sorry for my ignorance."?
Can I use it in a formal conversation?

One more question : 
What the difference among :
- Sorry for being dense.
- Sorry to be dense.
- Sorry to seem dense.
Could you please give some examples?

Thanks for helping me. :)

Answer

It will be the epitaph on George Bush's gravestone.

Answer

Yes, you can use it. 
Its meaning is THICKHEADED, slow to understand, or stupid. 

I can't believe she cheated on him and didn't tell him for a whole month, she thought everything would be okay, shes sooo dense. 
Sorry to seem dense, but are there really Martians? 
Sorry for being dense, but what is a conehead?

- Sorry for being dense. 
- Sorry to be dense. 
- Sorry to seem dense. 

All of the above have basically the same meaning. 
When the adjective "dense" is followed by a linking verb (to seem or to be, etc.) it expresses a state but no action.

Answer

Dense  

Definition:  slow, stupid  

Synonyms:  blockheaded, boorish, doltish, dull, dumb, fatheaded, ignorant, imbecilic, impassive, lethargic, numskulled, oafish, obtuse, phlegmatic, simple, slow-witted, sluggish, stolid, thick, torpid  

Antonyms:  brainy, clever, intelligent, smart  

Check this useful site. http://thesaurus.com/browse/dense

Answer

dense means stupid.
he's so dense, i have to tell him everything twice.