1. most covered with ice or most extremely cold
Usage: superlative form of icy
2. most unfriendly, hostile, or emotionally cold in manner
Usage: figurative use

Examples

• The iciest roads were closed due to dangerous driving conditions.
• January was the iciest month on record this year.
• She gave him the iciest stare when he interrupted her presentation.
• The mountain peak had the iciest conditions the climbers had ever encountered.
• His iciest response came when asked about the controversy.
• The iciest part of the lake never thaws completely.