Member

UK: /ˈmɛmbə/ US: /ˈmɛmbɚ/ ,(mem′bər)

Collins Concise English Dictionary © HarperCollins Publishers::

Member / ˈmɛmbə/ noun (sometimes not capital)

1. short for Member of Parliament
2. short for Member of Congress
3. a member of some other legislative body

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

mem•ber /ˈmɛmbɚ/   n. [countable]

1. an individual forming part of a group:
   a member of the House of Representatives.
2. Zoology, Anatomy a part or organ of an animal body;
   a limb, as a leg, arm, or wing.

WordReference Random House Unabridged Dictionary of American English © 2025

mem•ber  (mem′bər), n. 

1. Biology a person, animal, plant, group, etc., that is part of a society, party, community, taxon, or other body.
2. Government
   • a member of Congress, esp. of the House of Representatives.
   • a member of the British Parliament, esp. of the House of Commons.
   • any member of a legislative body.
3. a part or organ of an animal body;
   a limb, as a leg, arm, or wing.
4. Plant Biology [Bot.] a structural entity of a plant body.
5. Anatomy the penis.
6. a constituent part of any structural or composite whole, as a subordinate architectural feature of a building.
7. [Math.]
   • either side of an equation.
   • an element of a set.
8. Geology a stratigraphic unit recognized within a formation, and mapped as such.

adj. 

9. being a member of or having membership in an association, organization, etc.:
   member countries of the United Nations.

• Latin membrum
• Old French
• Middle English membre 1250–1300

mem′ber•less, adj. 
Synonyms

• 6. element, portion.

Collins Concise English Dictionary © HarperCollins Publishers::

member / ˈmɛmbə/ noun

1. a person who belongs to a club, political party, etc
2. any individual plant or animal in a taxonomic group
3. any part of an animal body, such as a limb
4. another word for penis
5. any part of a plant, such as a petal, root, etc
6. any individual object belonging to a set or logical class
7. a component part of a building or construction

Etymology: 13th Century: from Latin membrum limb, part

ˈmemberless adjective