1. most careful in speech and behavior; most tactful and prudent
Usage: superlative form of discreet

Examples

• She was the discreetest member of the committee when discussing sensitive matters.
• Among all the diplomats, he proved to be the discreetest in handling the crisis.
• The discreetest approach would be to wait until after the meeting.
• Of all her friends, Maria was the discreetest about keeping secrets.
• The lawyer chose the discreetest words when addressing the jury.
• He made the discreetest inquiry about her availability for the project.