complimentary

adj

1. In the nature of a compliment.

   “a complimentary remark”

   “But yesterday evening late, when Lewis arrived from down town he found his supper spread, and some presents of books there, with very complimentary writings on the fly-leaves, and certain very complimentary letters, and more or less greenbacks of dignified denomination pinned to those letters and fly-leaves...”

2. Free; provided at no charge.

   “complimentary drinks”

   “In the evenings, Ward and PJ offer guests a complimentary drink. This gesture seems to reinforce the hosts' desire to make everyone feel welcome.”

3. With respect to the closing of a letter, formal and professional.

   “The complimentary closing is the word grouping used to bring the message or text to a close.”