Meaning : At an opportune time.
Example :
Your letter arrived apropos.
Synonyms : apropos, seasonably, well-timed
Meaning : Before a time limit expires.
Example :
The timely filing of his income tax return.
Meaning : Done or happening at the appropriate or proper time.
Example :
A timely warning.
With timely treatment the patient has a good chance of recovery.
A seasonable time for discussion.
The book's publication was well timed.
Synonyms : seasonable, well timed, well-timed