intermediary

UK: /ˌɪntə^rˈmiːdiəri/

US: /ˌɪntɚˈmidiˌɛri/

US: (in′tər mē′dē er′ē)

Inflections of 'intermediary' (n): npl: intermediaries

WordReference Random House Learner's Dictionary of American English © 2025

in•ter•me•di•ar•y /ˌɪntɚˈmidiˌɛri/   n., pl. -ies, adj. 
n. [countable]

1. a person who comes between two groups and acts as a mediator to bring them into agreement;
   a go-between.

adj. 

2. being between:
   an intermediary stage in development.
3. serving as an intermediary between persons or parties:
   an intermediary diplomatic attaché.

WordReference Random House Unabridged Dictionary of American English © 2025

in•ter•me•di•ar•y  (in′tər mē′dē er′ē), n., pl. -ar•ies, adj. 
n. 

1. an intermediate agent or agency;
   a go-between or mediator.
2. a medium or means.
3. an intermediate form or stage.

adj. 

4. being between;
   intermediate.
5. acting between persons, parties, etc.;
   serving as an intermediate agent or agency:
   an intermediary power.

• Late Latin intermedi(um) intervening place + -ary; see intermediate¹
• 1785–95

Synonyms

• 1. arbitrator, umpire.

Collins Concise English Dictionary © HarperCollins Publishers::

intermediary / ˌɪntəˈmiːdɪərɪ/ noun ( -aries)

1. a person who acts as a mediator or agent between parties
2. something that acts as a medium or means

adjective

1. acting as an intermediary
2. situated, acting, or coming between; intermediate