PUNCTUAL
punctual, on time
(adjective) 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”; “she is always on time for class”
Source: WordNet® 3.1
Adjective
punctual (comparative more punctual, superlative most punctual)
Prompt; on time.
(of an event) Happening at the appointed time
(of a person) Acting at the appointed time
(mathematics) Existing as a point or series of points
(linguistics) Expressing momentary action that has no duration
(nonstandard, Euro-English) Periodic; occasional.
(dated) Observing trivial points; punctilious.
Source: Wiktionary
Punc"tu*al, a. Etym: [F. ponctuel (cf. Sp.puntual, It. puntuale),
from L. punctum point. See Point.]
1. Consisting in a point; limited to a point; unextended. [R.] "This
punctual spot." Milton.
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. "The race of the undeviating and punctual sun." Cowper.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition