principal, adj. 1. chief, prime, paramount; most important, first, highest, leading; main, major, cardinal, supreme; superlative, best, crowning, acmic, ac-matic, summital; greatest, maximal, nonpareil, unparalleled, matchless, peerless; utmost, uppermost, super-eminent, preminent; star, sovereign, ruling; prevailing, hegemonic, dominant, predominat; ranking, leading, foremost; definitive, conclusive, determinative; key, vital, crucial, central, essential; strongest, most effective, ultimate.
-n. 2. chief, head, lead; captain, Inf boss, Inf. bossman, Inf. kingpin, Inf. number one; SI. top dog, SI. honcho or head honcho; director, superior, chairman; manager, overseer, supervisor, foreman, Brit. gaffer; pacesetter, mover, inspirer, firer, spark, Inf. sparkplug; ringleader, bellwether, flagship, SI. the brains.
3. headmaster, dean, school principal, school superintendent; director, college president, chancellor.
4. capital, capital funds, assets, nonliquid funds, savings, reserves, cash reserves; investments, means, working capital, resources, wealth, treasure, trust moneys; backing, Inf. seed money.
principality, n. 1. realm, kingdom, domain, dominion; princedom, principate, empery, monarchy; duchy, grandduchy, archduchy, dukedom; earldom, palatinate, province, nation, state.
2. authority, position, power, supreme power, sovereignty; dynasty, regency, prerogative; predominance, rule, reign, hegemony; control, sway, mastery; influence, guidance, leadership; authorization, power, force; jurisdiction, domination, administration.
3. principalities Theology, archangels, princedoms; celestial attendants, divine messengers, messengers of God; heavenly host, host of heaven, choir invisible, ministering spirits.
principally, adv. chiefly, mainly, in the main, mostly, for the most part, predominately, on the whole; essentially, in essence, fundamentally, basically, in substance, at heart, at the core, at bottom, Fr. au fond; primarily, above all, first and foremost, in the first place, to begin with; especially, particularly, exceptionally, markedly, signally, notably.
principle, n. 1. rule, law, moral law, golden rule; rule of conduct, rubric, precept; guideline, rule of thumb, basic rule; formula, formulary, method, way; model, standard, criterion, convention, custom, practice; natural law, general truth, universal truth; regulation, ordinance, commandment; mandate, directive, dictum, canon, Both Rom. Cath. Ch. bull, encyclical.
2. tenet, maxim, axiom, postulate; truism, truth, self-evident truth; mathematical rule, Math, formula, theorem, hypothesis, Math, proposition, Math, corollary.
3. principles code, personal code, moral or ethical code; morals, ethics, ethos; standards, platform, ideals, conscience, moral sense, inner monitor, scruples, sense of duty; voice of conscience, that still small voice; morality, probity, uprightness, goodness, rectitude, righteousness; honesty, integrity, honor, character, decency, respectability; responsibility, fidelity, faithfulness, trustworthiness, constancy, loyalty; equity, justice, fair play, fairness, scrupulousness, justness; virtue, piety, purity, innocence, continence, temperance, restraint.