1. superlative form of still; most quiet, calm, or motionless
Usage: superlative form

Examples

• The lake was at its stillest just before dawn.
• She found the stillest corner of the library to study.
• Even the stillest water can hide strong currents beneath.
• The forest was stillest during the heat of midday.
• He waited for the stillest moment to take the photograph.
• The air was stillest in the valley between the mountains.