Punctual

a.	1.	Consisting in a point; limited to a point; unextended. The theory of the punctual existence of the soul. - Krauth.
	2.	Observant of nice points; punctilious; precise. Punctual to tediousness in all that he relates. - Bp. Burnet. So much on punctual niceties they stand. - C. Pitt.
	3.	Appearing or done at, or adhering exactly to, a regular or an appointed time; precise; prompt; as, a punctual man; a punctual payment. These sharp strokes [of a pendulum], with their inexorably steady intersections, so agree with our successive thoughts that they seem like the punctual stops counting off our very souls into the past. - J. Martineau.

Adj.

1.

punctual - 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" Antonyms: unpunctual - not punctual; after the appointed time

accurate, active, alert, apt, attentive, careful, close, compliant, conforming, conscientious, conscionable, constant, correct, critical, decisive, delicate, demanding, detailed, devoted, devout, duteous, dutiful, exacting, exigent, expeditious, exquisite, faithful, fastidious, fine, finical, finicking, finicky, fussy, heedful, immediate, instant, instantaneous, loyal, meticulous, mindful, minute, narrow, observant, on the dot, on time, overconscientious, overscrupulous, painstaking, particular, practicing, precise, precisianistic, precisionistic, punctilious, quick, refined, regardful, religious, rigid, rigorous, scrupulous, scrutinizing, speedy, strict, subtle, summary, swift, tender-conscienced, true