adjective
1.
Synonyms: careful 2, conscientious, conscionable, exact, fussy, heedful, meticulous, painstaking, punctilious, scrupulous
Antonyms: unpunctual
2.
marked by exact adherence to an appointed time
a punctual arrival
Synonyms: prompt, timely
Related Word: quick, ready
Idioms: on the dot, on time
Contrasted words: late, tardy
Antonyms: unpunctual