Acting or arriving or performed exactly at the time appointed:
— She expected guests to be punctual at meals.
— He is not a particularly punctual person.
— Punctual payment.

synonym: on time.

Roget 939: upright; honest, honest as daylight; veracious etc. 543; virtuous etc. 944; honorable; fair, right, just, equitable, impartial, evenhanded, square; fair and aboveboard, open and aboveboard; white [U.S.].    constant, constant as the northern star; faithful, loyal, staunch; true, true blue, true to one's colors, true to the core, true as the needle to the pole; marble-constant" [Antony and Cleopatra]; true-hearted, trusty, trustworthy; as good as one's word, to be depended on, incorruptible.    straightforward etc. (ingenuous) 703; frank, candid, open-hearted.    conscientious, tender-conscienced, right-minded; high-principled, high-minded; scrupulous, religious, strict; nice, punctilious, correct, punctual; respectable, reputable; gentlemanlike^†.    inviolable, inviolate; unviolated^†, unbroken, unbetrayed; unbought, unbribed^†.    innocent etc. 946; pure, stainless; unstained, untarnished, unsullied, untainted, unperjured^†; uncorrupt, uncorrupted; undefiled, undepraved^†, undebauched^†; integer vitae scelerisque purus [Lat.] [Horace]; justus et tenax propositi [Lat.] [Horace]. chivalrous, jealous of honor, sans peur et sans reproche [Fr.]; high-spirited.    supramundane^†, unworldly, other-worldly, overscrupulous^†.    ... show more

Roget 132a: timely, seasonable, in time, punctual, prompt.   

Roget 138: periodic, periodical; serial, recurrent, cyclical, rhythmical; recurring etc. v.; intermittent, remittent; alternate, every other.    hourly; diurnal, daily; quotidian, tertian, weekly; hebdomadal^†, hebdomadary^†; biweekly, fortnightly; bimonthly; catamenial^†; monthly, menstrual; yearly, annual; biennial, triennial, &c.; centennial, secular; paschal, lenten, etc. regular, steady, punctual, regular as clockwork.    ... show more

Roget 494: real, actual etc. (existing) 1; veritable, true; right, correct; certain etc. 474; substantially true, categorically true, definitively true &c.; true to the letter, true as gospel; unimpeachable; veracious etc. 543; unreconfuted^†, unconfuted^†; unideal^†, unimagined; realistic.    exact, accurate, definite, precise, well-defined, just, just so, so; strict, severe; close etc. (similar) 17; literal; rigid, rigorous; scrupulous etc. (conscientious) 939; religiously exact, punctual, mathematical, scientific; faithful, constant, unerring; curious, particular, nice, delicate, fine; clean-cut, clear-cut.    verified, empirically true, experimentally verified, substantiated, proven (demonstrated) 478.    rigorously true, unquestionably true.    true by definition.    genuine, authentic, legitimate; orthodox etc. 983.1; official, ex officio.    pure, natural, sound, sterling; unsophisticated, unadulterated, unvarnished, unalloyed, uncolored; in its true colors; pukka^†.    well-grounded, well founded; solid, substantial, tangible, valid; undistorted, undisguised; unaffected, unexaggerated, unromantic, unflattering.    ... show more

Roget 772: observant, faithful, true, loyal; honorable etc. 939; true as the dial to the sun, true as the needle to the pole; punctual, punctilious; literal etc. (exact) 494; as good as one's word.    ... show more

Dutch: punctueel, stipt
Polish: punktualny