Definitions

1. adjective

most careful and economical in the use of money or resources

“She was the thriftiest person in the family, always finding ways to save money.”

2. superlative form of ‘thrift’

having the highest degree of thriftiness

“He was known as the thriftiest person in the office, always looking for ways to cut costs.”

3. noun

the quality of being the thriftiest

“His thriftiest nature was an inspiration to everyone around him.”