used

verb

1. (form-of, participle, past)simple past and past participle of use

   “You used me! You never loved me at all!”

   “In 1866 Colonel J. F. Meline noted that the rebozo had almost disappeared in Santa Fe and that hoop skirts, on sale in the stores, were being widely used.”

2. In used to.

adj

1. That is or has or have been used.

   “The ground was littered with used syringes left behind by drug abusers.”

   “Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.”

2. That has or have previously been owned by someone else.

   “He bought a used car.”

3. In used to.