Planets can hold one of 5 Essential Dignities, in descending order of strength: Domicile, Exaltation, Triplicity, Term and Face. So that, being in his own term gives Saturn a minor strengthening in the face of retrogradation, exact and mutually applying opposition to Mercury, applying conjunction with Uranus [I would want to use the ephemeris to see the future motions of these two] and what is, in my opinion, a rather indifferntly conditioned but supposedly supportive dispositor in Jupiter.
The terms are rather arbitray divisions of signs into five segments. Each of the segments has a planetary lord or dispositor. For example, Sagittarius is divided thus: From 0 Sag 01 thru 8 Sag 00 is under the rule of Jupiter (who is also domicile ruler, and so very powerful if found there or ruling planets inhabiting that segment),from 8 Sag 01 thru 14 Sag 00, Venus, thru 19 Sag 00, Mercury, thru 25 Sag 00, Saturn, and thru to the end of the sign at 00 Capricorn 00, to Mars.
So you see that Saturn is in his own term, which is a minor essential dignty and strenthens a planet. He has some control of the ground on which he stands. However, he is still beholden to Jupiter, dispositor (domicile ruler) of Sagitarrius. If the power of domicile is given 5 for power, the term has a power of 2. These values are used to appraise the relative power among different planets in specific degrees of the horoscope, in order to determine the almuten -- or most powerful planet in that degree. The almuten is the dispositor of that degree, and any planet or point (such as the Ascendant) in it. There is, somewhere in this forum, a thread on "Disposition" that you may find helpful.
There are two types of Dignity: Essential and Accidental. The Essential dignities are based solely on sign position. The name essential explains their nature and meaning in natal astrology. and shows their role in interpretation. The essential digniitie -- along with their counterparts, the Essential Debilities: Detriment (also known as Exile), Fall -- the opposite of Exaltation (look up the word "fall" in a good dictionary), and then out of triplicity, out of term, out of face describe the essential nature or charater of the native.
JUPASC can gve you the Table of Dignities, which might be put on your harddrive and kept easily accessible for quick reference. Thus, with each horoscope you examine you can evaluate the strength of each of the planets in the chart in the degree where they stand and points they might rule. One of the keys to horoscope interpretation is to determine the identity of the most powerful planet in the horoscope. These essential dignities are one among several tools used to appraise power. Power is a double-edged sword. If a planet is in dignity, that normally strengthens the planet for good. But in some unusual cases the powerful planet may be otherwise conditioned toward evil, and the power may be turned in that direction. JUPASC can also point you toward a chart or table by an astrologer such as Lilly showing and assigning values the different sorts of dignities and debilities.
Accidental Dignity is concerned with the accidents of life and is not of the essential character shown by the signs. However, quite often a planet may be especially powerful and determined toward manifestation or culmnation at an early age so their effect is effectively essential. Th4e response to the manfestation of the planetary energies occurred early, is deep and beyond consciousness. One of the most common of the Accidental Dignities is Angularity. Allowances (orb) will vary somewhat from astrologer to astrologer, but I would say that a planet within 10 degrees before of 5 degrees after (counterclockwise) is strongly angular, andi is angular if contained withing the 1st, 4th, 7th or 10th houses.
A planet that holds no essential dignity (or debilty) in the degree of the zodiac where it is located is said to be Peregrine, or without essential dignity. The word peregrine indicates a wanderer, an outsider, a foreigner. Not to be trusted nor tempted and apt to make trouble. Hark, hark, the dogs do bark, the beggars are coming to town.
You don't have to say "expand" twice to me.....