alibi
Americannoun
-
alibis
plural
-
Law. the defense by an accused person of having been elsewhere at the time an alleged offense was committed.
-
an excuse, especially to avoid blame.
- Synonyms:
- justification, reason, explanation
-
a person used as one's excuse.
My sick grandmother was my alibi for missing school.
verb (used without object)
-
alibis,
present (3rd person singular)
-
alibied,
past participle, past
-
alibiing
present participle
verb (used with object)
-
alibis,
present (3rd person singular)
-
alibied,
past participle, past
-
alibiing
present participle
noun
-
law
-
a defence by an accused person that he was elsewhere at the time the crime in question was committed
-
the evidence given to prove this
-
-
informal an excuse
verb
Other Word Forms
Inflected Forms
Nouns
Participles
Conjugated Forms
Present
-
alibisimple
-
alibissimple
-
have alibiedperfect
-
has alibiedperfect
-
am alibiingprogressive
-
are alibiingprogressive
-
is alibiingprogressive
-
have been alibiingperfect progressive
-
has been alibiingperfect progressive
Past
-
alibiedsimple
-
had alibiedperfect
-
was alibiingprogressive
-
were alibiingprogressive
-
had been alibiingperfect progressive
Future
Etymology
Origin of alibi
First recorded in 1610–20; from Latin alibī (adverb): “in another place, elsewhere”
Explanation
Your alibi is evidence that proves your innocence. If you were making cookies with your mom when someone raided your sister's piggy bank, your mom is your alibi, since she knows you were with her when the crime was committed. The noun alibi is the same word as its Latin root, alibi, which means "excuse." When you provide an alibi, you are giving proof — a certified excuse — that you could not have committed a crime. Alibi is easy to confuse with alias, which means "an assumed, or false, name."
Vocabulary lists containing alibi
The Westing Game
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Twelve Angry Men
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"The Pedestrian" by Ray Bradbury
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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.
See Examples For:
Lane’s alibi hinged on whether anyone had seen the sisters alive after his return to rehab.
From The Wall Street Journal ● Jul. 10, 2026
The governor has denied any knowledge of the plot and has an alibi that he was traveling to Los Angeles that day.
From Los Angeles Times ● May 10, 2026
But he got his first name wrong, and the person he actually accused turned out to have a firm alibi.
From The Wall Street Journal ● Apr. 16, 2026
The person in question had no alibi for the night of the murder and had failed two polygraph tests, according to police records.
From Slate ● Apr. 6, 2026
There was no way I could forget about Marcus’s alibi witness, especially now that I had her name.
From "From the Desk of Zoe Washington" by Janae Marks
Their mother, Easther McCook, 51, was sentenced to two years, suspended for three years, for perverting the course of justice by providing false alibis for her sons.
From BBC ● May 29, 2026
Other potential suspects had alibis of their own.
From Slate ● Apr. 6, 2026
Baker’s housemates, Duncan Martinez and Nathan Blalock, both military veterans in their early 20s, had been the last known people to see him alive, and served as each other’s alibis.
From Los Angeles Times ● Jun. 19, 2025
The two offered alibis, and no physical evidence linked them to the crime.
From Seattle Times ● Oct. 30, 2022
Excuses, alibis, and wild cover-up stories chased each other around Harry’s brain, each more feeble than the last.
From "Harry Potter and the Sorcerer's Stone" by J.K. Rowling
Williams excoriated feminist leaders who excused Bill and alibied for him.
From New York Times ● Nov. 15, 2017
When Berlin was bombed, Germans alibied that the R.A.F.:
From Time Magazine Archive
James E. Barrett alibied: "There was a hole in the wall and I just fell through."
From Time Magazine Archive
He damned his critics, alibied himself, said that his grief and helplessness, bringing on another attack of tuberculosis, had brought him to the edge of the grave.
From Time Magazine Archive
He had recalled Sim Colby’s black ones while thinking of unusual eyes in general and had, in passing, set him down as one who stood alibied.
From The Law of Hemlock Mountain by Hugh Lundsford
By now Detroit was through alibiing for '58.
From Time Magazine Archive
The combination of televised second-guessing, N.F.L. stonewalling and coaches complaining, perhaps alibiing, has brought the striped-shirt arbiters a notoriety they would just as soon had passed them by.
From Time Magazine Archive
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.
