I won't debate the topic any longer as I mentioned previously, but I will answer the questions concerning defining.
To "Enlist" in the military, you must be going in as an "Enlisted Member". Vs a "Commissioned Officer". The main difference is obligation. And ENLISTMENT is a set number of years. Usually 4 years. But there are some who enlist for 6 years. And I think, they USE TO, the army has a 2 year enlistment option. Officers (Commissioned) on the other hand only have an initial obligation based on any training the military provided. e.g. 5 years for attending the academy; 10 for pilot training;. Once the obligation period is over, an officer doesn't "Re-Enlist". Think of it as an "Open-Ended" contract. Just like a civilian job. At any time after the obligatory requirements are met, the officer "OR THE MILITARY", can decide to end the relationship. The enlisted on the other hand has basically contracted themselves for another period of 2, 4, or 6 years.
BUT, as has been discussed a number of times in this thread, and applies to the "Other" discussion that took place. The military has to use a vocabulary that the common citizen is familiar with. Even if the meaning isn't 100% identical to what the military means. After all, the military is trying to recruit "employees" (Another common word) just like other companies are. And they will use whatever "Key Words" or "Catch Phrases" they need to in order to be competitive with the pool of "employees", "Students", etc. that they are trying to "Recruit".
Any cadet or enlisted person with more than one year wearing a uniform knows what I mean. The first or second time they go home on "vacation" (Leave) after being in the military for a year or two, they know what it's like. Talk to your family and friends about wearing ABU's; and going TDY. Or how you're collecting BAS because you're not at your base where there's a Chow Hall. Tell them how excited you are to get to go PCS to your first assignment. And how you have to go to MPF "Military Personnel Flight" to get you "Orders" so you can go to TMO "Traffic Management Office" to have you belongings shipped to your next assignment.
The list goes on. The military has a totally different way of speaking. Many of the words have different meanings than in the civilian world. Just like "English" words in England and the United States can have totally different meanings. The academy is no different when advertising and speaking to perspective applicants/cadets. They will say "Christmas or Spring VACATION" instead of "Leave". They will use words like Blue Chip and Recruited Athlete and signing day to a football player and his family; even though these DON'T EXIST. They will use the work scholarship interchangeably. That's because these are the words most people are familiar with.
Matter of fact, I'll have to look for it, but the last presentation I made at a high school for an appointee, I was "GIVEN" a basic presentation speech. Part of it specifically said not to use the word "Scholarship". It specifically said to use phrases like: "A Package worth approximately $400,000" and similar terms. But again, I'm not debating this topic. I said my piece on it and stand my ground. Simply pointing out, because the question of "Enlisting" was brought up. In the civilian world, a lot of people think ALL MILITARY personnel "ENLISTED". Many schools, because of their profile that they are submitting nationally to universities as well as the department of education and similar; will combine military academy appointees into their "Scholarship" category vs the individual who is paying directly for school. It helps their stats. The military is a different world. It has it's own vocabulary; it's own meaning; and many other difference. But academy cadets "Are In the Military". They are subject to the Uniform Code of Military Justice. They are EMPLOYED by the MILITARY. And because of this, there are a lot of comparisons to civilian life that are used, that aren't quite accurate. But, in order to compete for this labor force; certain terminology must be used so the interested parties have some idea of what they are looking at.
Go to an "Enlistment Recruiters Office" some time. To talk to them will sound just like going to a community college for a "JOB FAIR". They use the vocabulary that potential recruits "Employees" can relate to. If you didn't know better, you'd swear you were being recruited by a head hunting type company for a job.