1. most severe or strict in manner, attitude, or expression
Usage: superlative form of austere
2. most plain and simple, without decoration or luxury
Usage: superlative form of austere

Examples

• The monastery’s austerest rooms contained only a bed and a small table.
• Even the austerest critics praised her performance.
• He lived in the austerest conditions, owning almost nothing.
• The judge’s austerest expression silenced the courtroom.
• The building’s austerest design featured plain concrete walls.
• Her austerest diet consisted of bread and water.
• The school’s austerest rules prohibited any personal decorations.