Thanks for following up. You will note I condensed your email a little. What I have been saying is that while all hermits live in silence and solitude, not all those who live in silence and solitude are hermits --- at least not as the church defines the hermit, yes. You've got that too! As I have written here many times over the years, not every form of silence and solitude is eremitical and not every form of life that has been called "hermit" over the centuries has either the character or the dignity and meaning of the life the Church identifies as eremitical. Some are transitional forms of solitude occasioned by grief or depression, for instance; similarly then, some are necessary to get one's bearings and come to know oneself anew as one prepares to move on in one's life. Others are forms of misanthropy, or are rooted in personal failure and fear of living, for instance. Some are matters of temperament, or dictated by personal woundedness alone. Others are defined by artistic and literary pursuits of various kinds. None of these, of themselves, are eremitical and several can never become authentically eremitical.
Similarly, not all forms of silence are eremitical. Some are rooted in personal muteness --- in the inability to address or be addressed by others --- whatever the etiology; some are a form of despair and a related inability to be related to others or, therefore, to oneself and the dialogue with God, others, and self which authentic human life actually is. Thus too, not every form of withdrawal is eremitical or worthy of eremitic life with its characteristic anachoresis. Some is unhealthy (see other posts on this) or outright pathological, cynical, and embittered. While the dictionary definition of hermit may have the effect of lumping all of these forms of life together with the life c 603 identifies as eremitical, and while the stereotypes we all know regarding what a hermit is, how they behave and are motivated, do the same, I don't think this serves the vocation of hermit. We can neither understand nor appreciate the eremitical vocation, whether communal or solitary unless we draw a strong red line between common definitions and the more narrow one I am using. Especially we cannot know eremitical life as a gift of the Holy Spirit to the Church and world unless we take this more finely defined notion as our criterion of understanding.
What distinguishes all of these various forms of solitary and silent life at this level is the redemptive element and experience which either stands at or is missing from the heart of each of them. I do believe canon 603 points to this reality even though it never says "redemptive experience" in so many words. What it does say however is, "the silence of solitude" rather than silence and solitude, and also "for the salvation of the world". Both of these phrases point to something which is greater than the sum of either their parts (as in the case of the silence of solitude) or all of the central elements of the canon as a whole (i.e., vows, Rule of life, assiduous prayer and penance, silence of solitude, stricter separation, and supervision by bishop/delegate). Both phrases point to something which all of the central elements in the canon serve, support, and allow to emerge both in the life of the hermit (especially there) and for those to whom the hermit witnesses. I believe what they serve, support, and allow to emerge is the redemptive experience which is central to eremitical life in the silence of solitude.
I am not concerned that my way of understanding the meaning of "hermit" or "eremitical life" is narrower than a dictionary definition's might be. Remember that common dictionaries provide descriptive meanings --- that is meanings which describe how most people use these terms. They are not primarily prescriptive --- that is, they do not prescribe how words must be used. In some areas (faith, theology) common dictionary meanings significantly betray the more accurate meaning of terms because what is given are "the ways most folks understand and use these terms." If you ask someone (or a common dictionary) what a parable is you are apt to get the following, "a brief religious story with a moral". But in the NT, Jesus' parables are decidedly not stories with a moral. Similarly, some dictionaries might define faith as "belief without evidence" or some form of unreasonable assent. Again, however, in Christianity, faith is neither of these but a profound and "transrational" form of trust involving both knowing and being known. In the case of the term "hermit" I am speaking of a vocation summoning one to wholeness in Christ which is sought and lived on behalf of others as opposed to a choice for isolated existence "off the grid" which benefits oneself alone. In the case of the Catholic hermit solitude is a profoundly related and interrelated reality and a generous one as well. We point to this truth when we identify it as an ecclesial vocation.
I am also not concerned with with what could be construed as a narrower way of defining hermits and eremitism because I believe this definition is 1) consonant with and rooted in an explication of c 603, which 2) I have come to from my personal experience of living the life (rather than from merely reading about it for instance), and 3) as note above, this definition reflects the gift this life is from the Holy Spirit to the church and world, and allows the eremitical life to be truly esteemed as a healthy, lifegiving, genuinely kerygmatic, and inspiring way of life. Again, it is a vocation which can console and challenge many and I believe it speaks especially to the chronically ill, those who are living alone after losing a spouse, for instance, and many others who might be wondering if their lives are meaningful because they can't or don't compete according to this culture's dominant paradigm of success or achievement, prestige and power. Stereotypes of "hermit life" and more common notions of what a hermit is cannot do this.
I hope this is helpful. Blessings on your Lenten journey!