- First in importance, degree, or rank.
- First in time, order, or sequence.
- First in excellence, quality, or value.
- Having exactly two integral factors: itself and unity (1 in the case of integers).
- Such that if it divides a product, it divides one of the multiplicands.
- Having its complement closed under multiplication: said only of ideals.
- Marked or distinguished by the prime symbol.
- Early; blooming; being in the first stage.
- Lecherous, lewd, lustful.

- The first hour of daylight; the first canonical hour.
- The religious service appointed to this hour.
- The early morning generally.
- The earliest stage of something.
- The most active, thriving, or successful stage or period.
- The chief or best individual or part.
- The first note or tone of a musical scale.
- The first defensive position, with the sword hand held at head height, and the tip of the sword at head height.
- A prime element of a mathematical structure, particularly a prime number.
- A four-card hand containing one card of each suit in the game of primero; the opposite of a flush in poker.
- Six consecutive blocks, which prevent the opponent's pieces from passing.
- The symbol ′ used to indicate feet, minutes, derivation and other measures and mathematical operations.
- Any number expressing the combining weight or equivalent of any particular element; so called because these numbers were respectively reduced to their lowest relative terms on the fixed standard of hydrogen as 1.
- An inch, as composed of twelve seconds in the duodecimal system.
- The priming in a flintlock.
- A feather, from the wing of the cock ostrich, that is of the palest possible shade.
- An intermediate sprint within a race, usually offering a prize and/or points.

- To prepare a mechanism for its main work.
- To apply a coat of primer paint to.
- To be renewed.
- To serve as priming for the charge of a gun.
- To work so that foaming occurs from too violent ebullition, which causes water to become mixed with, and be carried along with, the steam that is formed.
- To apply priming to (a musket or cannon); to apply a primer to (a metallic cartridge).
- To prepare; to make ready; to instruct beforehand; to coach.
- To trim or prune.
- To mark with a prime mark.

- indivisible
- bloom, blossom, efflorescence, flower, flush, heyday, peak
- choice, prize, quality, select
- prime number
- white
- ground, undercoat

- biprime
- pseudoprime
- semiprime
- coprime
- additive prime
- annihilating prime
- Bell prime
- Carol prime
- Catalan prime
- centered decagonal prime
- centered heptagonal prime
- centered square prime
- centered triangular prime
- Chen prime
- circular prime
- cousin prime
- Cuban prime
- Cullen prime
- delannoy prime
- deletable prime
- dihedral prime
- double factorial prime
- double Mersenne prime
- Eisenstein prime without imaginary part
- emirp
- Euclid prime
- Euclid-Mullin Sequence prime
- Euler irregular prime
- even prime
- factorial prime
- Fermat prime
- Fibonacci prime
- fortunate prime
- Gaussian prime
- generalized Fermat prime base 10
- Genocchi prime
- Gilda's prime
- good prime
- happy prime
- harmonic prime
- Higgs prime for squares
- highly cototient prime
- illegal prime
- irregular prime
- isolated prime
- Kynea prime
- left-truncatable prime
- Leyland prime
- long prime
- Lucas prime
- lucky prime
- Markov prime
- Mersenne prime
- Mills prime
- minimal prime
- Motzkin prime
- Newman–Shanks–Williams prime
- non-generous prime
- odd prime
- Padovan prime
- palindromic prime
- palindromic wing prime
- partition prime
- Pell prime
- permutable prime
- Perrin prime
- Pierpont prime
- Pillai prime
- prime of Binary Quadratic Form
- prime triplet
- primeval prime
- primorial prime
- Proth prime
- Pythagorean prime
- Quartan prime
- Ramanujan prime
- regular prime
- repunit prime
- right-truncatable prime
- safe prime
- Schröder prime
- Schröder-Hipparchus prime
- self prime
- sexy prime
- Smarandache-Wellin prime
- Smarandache–Wellin prime
- Solinas prime
- Sophie Germain prime
- star prime
- Stern prime
- super-prime
- supersingular prime
- swinging prime
- Thabit prime
- titanic prime
- twin prime
- two-sided prime
- Ulam prime
- unique prime
- Wagstaff prime
- Wall–Sun–Sun prime
- Weakly primes
- Wedderburn-Etherington prime
- Wieferich prime
- Wilson prime
- Wolstenholme prime
- Woodall prime

- Borrowed from French prime, from Latin primus ("first"), from earlier prīsmos < *prīsemos < Proto-Italic *priisemos, ultimately from Proto-Indo-European *per- ("beyond, before"). primo.
- The noun sense "apostrophe-like symbol" originates from the fact that the symbol ′ was originally a superscript Roman numeral one.
- Related to primage and primus.
- From French prime.

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