Definitions

1. adverb

free of charge; without cost or payment.

“The company offers a free consultation, but any actual work would be done gratis.”

2. adjective

done or given without charge or payment.

“The charity operates on a volunteer basis, doing much of its work gratis.”

3. noun

something that is given or done without charge or payment.

“The town’s new community center was a gift, a piece of land donated gratis by a local businessman.”