Definitions

1. adjective

most suitable for the time or occasion; most appropriate or fitting

“This is the timeliest moment to discuss our plans.”

2. superlative adjective

more than timeliest; used to compare three or more things

“These three options are all good, but this one is the timeliest.”

3. noun

the quality or state of being timely; promptness

“The timeliest thing about this service is its fast response time.”