1. most tightly stretched or drawn; having the greatest tension
Usage: superlative form of taut
2. most tense or strained in feeling or manner
Usage: superlative form of taut

Examples

• The rope was at its tautest point just before it snapped.
• Her muscles were tautest during the final stretch of the race.
• The violin string should be the tautest it can be without breaking.
• His face showed the tautest expression of concentration.
• The fabric was pulled to its tautest state across the frame.
• During the negotiation, the atmosphere was at its tautest moment.