English Reference
adjective

complimentary

adj.
US /ˌkɑmpɫəˈmɛntɝi/ UK /kˌɒmplɪmˈɛntəɹi/ com·pli·men·ta·ry

  1. 01 B2 Upper Intermediate

    given for free, usually by a business like a hotel or restaurant.

    provided without charge as a courtesy or for promotional purposes.

    Simple

    The hotel provides a complimentary breakfast for all guests staying in the building.

    In context

    The airline offered complimentary champagne to passengers in first class to compensate for the two-hour delay on the tarmac.

    Usage

    Usually placed before the noun it describes.

    Pitfall
    The breakfast was complementary. The breakfast was complimentary.

    Do not confuse 'complimentary' (free/praising) with 'complementary' (things that go well together).

  2. 02 B2 Upper Intermediate

    saying something nice or showing that you admire someone.

    expressing a compliment; conveying praise, admiration, or approval.

    Simple

    The teacher was very complimentary about my latest essay in front of the class.

    In context

    The critics were surprisingly complimentary regarding the director's debut film, despite its modest production budget.

    Usage

    Often used with the preposition 'about'.

  3. 03 C1 Advanced FormalTechnical

    used to describe the formal way you end a professional letter.

    relating to the conventional closing of a formal letter before the signature.

    Simple

    She chose a standard complimentary close like 'Yours sincerely' for her job application.

    In context

    The business writing manual explains which complimentary closings are appropriate for different levels of professional hierarchy.

    Usage

    Almost exclusively used in the phrase 'complimentary close' or 'complimentary closing'.

Don't confuse

complimentary vs complementary — Complementary describes things that complete each other, while complimentary describes praise or items provided for free.

None of the songs about him were complimentary.

BBC News· 8 Sept 2026

From compliment (noun) + -ary. Piecewise doublet of complementary.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated