A lot of emphasis on not imprinting etc. What do I care?
Sheep run scared, and there are millions more of them than those upstanding few who desire to be left alone while ensuring they have some ability to defend against crime. And when they go running to the authorities in fearful tones about the gun-toting madman loose in their streets, the authorities come running. In places that willingly support such aggressive, harassing behavior by its law enforcement community, it can literally cost you thousands of dollars to keep cleaning the legal muck of your head after it has been dumped on you, all to merely clear your name. THAT is why you care. The degree to which you should care will vary by how energetically and vehemently your local law enforcement authorities "jump" when such calls by the fearful populace come in.
Basically, that's it. That's why complete concealment in accordance with the statutes for CHL is important.
Some states aren't so energetic, instead realizing that we're card-carrying good guys, that we're not threatening anyone, that the job is to go after criminals and not to jump at the sound of every screaming ninny who calls in about Guns! Guns! Guns! Depends on your state's laws, and your area's LEO's and what they've been told by their captains as to how aggressively to wield the baton and their force.
As for the definition, it's as simple as the words found in the dictionary:
Concealed: out of sight.
Carry: to wear or have on one's person.
Review your state's laws on brandishing, threatening behavior, causing fear/disruption, and recent cases in the past 5yrs of law enforcement's behavior with respect to calls for "man with a gun" situations by fearful people who want you controlled. Then you'll know how close to that ideal you need to be.