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senior
senioradjectiveolder or elder (designating the older of two men bearing the same name, as a father whose son is named after him, often written as Sr. or sr. following the name).
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Senior
Senioradjectivebeing the older: used to distinguish the father from the son with the same first name or names
senior
Americanadjective
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older or elder (designating the older of two men bearing the same name, as a father whose son is named after him, often written as Sr. or sr. following the name).
I'd like to speak with the senior Mr. Hansen, please.
I'm privileged to introduce Mr. Edward Andrew Hansen, Sr.
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of earlier appointment or admission, as to an office, status, or rank.
a senior partner.
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of higher or the highest rank or standing.
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(in American schools, colleges, and universities) of or relating to students in their final year or to their class.
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(in certain American colleges and universities) of or relating to the final two years of education, during which a student specializes in a certain field of study.
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of, for, or pertaining to a senior citizen or senior citizens as a group.
senior discounts on local bus fares.
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of earlier date; prior to.
His appointment is senior to mine by a year.
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Finance. having a claim on payments, assets, dividends, or the like prior to other creditors, mortgages, stockholders, etc.
noun
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a person who is older than another.
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a person of higher rank or standing than another, especially by virtue of longer service.
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(in the U.S.) a student in the final year at a high school, preparatory school, college, or university.
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a fellow holding senior rank in a college at an English university.
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(initial capital letter) a member of the Girl Scouts from 14 through 17 years of age.
adjective
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higher in rank or length of service
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older in years
senior citizens
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of or relating to adulthood, maturity, or old age
senior privileges
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education
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of, relating to, or designating more advanced or older pupils
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of or relating to a secondary school
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of, relating to, or designating students in the fourth and final year at college
noun
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a senior person
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an elderly person
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a senior pupil, student, etc
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a fellow of senior rank in an English university
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adjective
Etymology
Origin of senior
1350–1400; Middle English < Latin, equivalent to sen ( ex ) old, old man + -ior comparative adj. suffix
Explanation
You can use the word senior to describe anyone who's older than you are. You might say, "My brother is six years my senior," especially if you want to make him feel old. Senior means "older," but it also means "old or aged," like your grandmother, who despite being a senior citizen, continues her skydiving hobby. A senior is also a student in the final year of either high school or college, or an authority: "She holds a senior position in the State Department." The Latin word senior means "older," and it's the basis of respectful terms in many languages, like señor in Spanish and sire in French.
Vocabulary lists containing senior
Ancient Wisdom: Synonyms for "Old"
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Graham's Top 50 Words, in terms of relevance
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“These new rules create huge loopholes for plastic packaging that violate the law,” said Avinash Kar, senior director of the toxics program at the Natural Resources Defense Council.
From Los Angeles Times • May 7, 2026
Kissinger accepted Xi’s invitation but wanted to be sure AI was on the agenda, said Robert Hormats, who was Kissinger’s senior economic adviser in the 1970s and advised him on the 2023 visit.
From The Wall Street Journal • May 7, 2026
A senior police officer told PTI news agency that there was a meeting in the market to celebrate the BJP's victory but that "no untoward incident" had taken place.
From BBC • May 7, 2026
"Designing and building these thrusters over the last couple of years has been a long lead-up to this first test," said James Polk, senior research scientist at JPL.
From Science Daily • May 6, 2026
“Greg was forced to get short into the CDOs,” says a former senior member of Deutsche Bank’s CDO team.
From "The Big Short" by Michael Lewis
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.