System of adaptable working hours

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ The group members used flexitime without clocks and effectively policed their own team discipline.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
flexitime \flex"i*time`\, flextime \flex"time`\ flex time \flex" time`\, n. [short for flexible time.] A system of scheduling working hours in places of employment, which allows employees to arrive at and leave work at times of their own choice, providing ...

Wiktionary Word definitions in Wiktionary
n. An arrangement that allows employees to set their own working hours within agreed limits; normally must include certain periods (core time) when they must be at work.