1. past tense of perk; became more lively, alert, or cheerful
2. past tense of perk; stood up straight or pointed upward
Usage: often used with ‘up’

Examples

• She perked up when she heard the good news.
• The dog’s ears perked when it heard footsteps.
• His mood perked after getting some coffee.
• The flowers perked up after being watered.
• The student perked up during the interesting lecture.
• Her ears perked at the sound of her name.