know

[ noh ]

/ noʊ /

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SEE MORE SYNONYMS FOR know ON THESAURUS.COM

verb (used with object), knew, known, know·ing.

to perceive or understand as fact or truth; to apprehend clearly and with certainty: I know the situation fully.

to have established or fixed in the mind or memory: to know a poem by heart; Do you know the way to the park from here?

to be cognizant or aware of: I know it.

be acquainted with (a thing, place, person, etc.), as by sight, experience, or report: to know the mayor.

to understand from experience or attainment (usually followed by how before an infinitive): to know how to make gingerbread.

to be able to distinguish, as one from another: to know right from wrong.

Archaic. to have sexual intercourse with.

verb (used without object), knew, known, know·ing.

to have knowledge or clear and certain perception, as of fact or truth.

to be cognizant or aware, as of some fact, circumstance, or occurrence; have information, as about something.

noun

the fact or state of knowing; knowledge.

Nearby words

Idioms

in the know, possessing inside, secret, or special information.

know the ropes, Informal. to understand or be familiar with the particulars of a subject or business: He knew the ropes better than anyone else in politics.

Origin of know

before 900; Middle English knowen, knawen, Old English gecnāwan; cognate with Old High German -cnāhan, Old Norse knā to know how, be able to; akin to Latin (g)nōvī, Greek gignṓskein. See gnostic, can¹

SYNONYMS FOR know

1. Know, comprehend, understand imply being aware of meanings. To know is to be aware of something as a fact or truth: He knows the basic facts of the subject. I know that he agrees with me. To comprehend is to know something thoroughly and to perceive its relationships to certain other ideas, facts, etc. To understand is to be fully aware not only of the meaning of something but also of its implications: I could comprehend all he said, but did not understand that he was joking.

SEE MORE SYNONYMS FOR know ON THESAURUS.COM

Related formsknow·er, noun

know

[ noh, nou ]

/ noʊ, naʊ /

noun Scot. and North England.

knoll¹.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for know

They know they will face either a swift backlash or deafening silence.
Phylicia Rashad and the Cult of Cosby Truthers|Stereo Williams|January 8, 2015|DAILY BEAST
What they say is, ‘We don’t approve of violence, but you know what?
Bill Maher: Hundreds of Millions of Muslims Support Attack on ‘Charlie Hebdo’|Lloyd Grove|January 8, 2015|DAILY BEAST
No one seems to know who that is—or why they would want to do such a thing.
Phylicia Rashad and the Cult of Cosby Truthers|Stereo Williams|January 8, 2015|DAILY BEAST
I mean, physically, mentally, you know, in every way, shape, and form.
I Tried to Warn You About Sleazy Billionaire Jeffrey Epstein in 2003|Vicky Ward|January 7, 2015|DAILY BEAST

Instead, the man and woman in the truck wanted to know where the crash site was and whether would I show them.
The 7-Year-Old Plane Crash Survivor’s Brutal Journey Through the Woods|James Higdon|January 7, 2015|DAILY BEAST
His stomach was empty—which he knew, and his soul was empty—which he did not know.
A Rainy June and Other Stories|Ouida
You know, looking after the stores and all that sort of thing.
The War-Workers|E.M. Delafield
When shall we know whether they are dead or alive, whether strong and healthy or moaning upon a bed in hospital?
Six Women and the Invasion|Gabrielle Yerta
This clears the atmosphere, so to speak, and we know who were after.
The Motor Boys on the Wing|Clarence Young
How are we to know what is right and wrong, and what are our motives for approving and disapproving the good and the bad?
The Life of Sir James Fitzjames Stephen, Bart., K.C.S.I.|Sir Leslie Stephen

British Dictionary definitions for know

know

/ (nəʊ) /

verb knows, knowing, knew (njuː) or known (nəʊn) (mainly tr)

(also intr; may take a clause as object) to be or feel certain of the truth or accuracy of (a fact, etc)

to be acquainted or familiar withshe's known him five years

to have a familiarity or grasp of, as through study or experiencehe knows French

(also intr; may take a clause as object) to understand, be aware of, or perceive (facts, etc)he knows the answer now

(foll by how) to be sure or aware of (how to be or do something)

to experience, esp deeplyto know poverty

to be intelligent, informed, or sensible enough (to do something)she knew not to go home yet

(may take a clause as object) to be able to distinguish or discriminate

archaic to have sexual intercourse with

I know what I have an idea

know what's what to know how one thing or things in general work

you know informal a parenthetical filler phrase used to make a pause in speaking or add slight emphasis to a statement

you never know things are uncertain

noun

in the know informal aware or informed

Derived Formsknowable, adjectiveknower, noun

Word Origin for know

Old English gecnāwan; related to Old Norse knā I can, Latin noscere to come to know

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for know

know

Old English cnawan (class VII strong verb; past tense cneow, past participle cnawen), "to know, perceive; acknowledge, declare," from Proto-Germanic *knew- (cf. Old High German bi-chnaan, ir-chnaan "to know"), from PIE root *gno- "to know" (cf. Old Persian xšnasatiy "he shall know;" Old Church Slavonic znati, Russian znat "to know;" Latin gnoscere; Greek *gno-, as in gignoskein; Sanskrit jna- "know"). Once widespread in Germanic, this form is now retained only in English, where however it has widespread application, covering meanings that require two or more verbs in other languages (e.g. German wissen, kennen, erkennen and in part können; French connaître, savoir; Latin novisse, cognoscere; Old Church Slavonic znaja, vemi). The Anglo-Saxons used two distinct words for this, witan (see wit) and cnawan.

Meaning "to have sexual intercourse with" is attested from c.1200, from the Old Testament. To not know one's ass from one's elbow is from 1930. To know better "to have learned from experience" is from 1704. You know as a parenthetical filler is from 1712, but it has roots in 14c. To know too much (to be allowed to live, escape, etc.) is from 1872. As an expression of surprise, what do you know attested by 1914.

know

"inside information" (as in in the know), 1883; earlier "fact of knowing" (1590s), from know (v.).

Idioms and Phrases with know

know

In addition to the idioms beginning with know

know all the answers
know a thing or two
know beans
know better
know by heart
know by sight
know enough to come in out of the rain
know from Adam
know if one is coming or going
know it all
know like a book
know one's own mind
know one's place
know one's stuff
know one's way around
know only too well
know the ropes
know the score
know where one stands
know which side of one's bread is buttered

also see:

before you know it
(know) by heart
come in out of the rain, know enough to
coming or going, know if one's
for all (I know)
god knows
(know) inside out
in the know
it takes one to know one
left hand doesn't know what right hand is doing
not know beans
not know from Adam
not know where to turn
not know which way to jump
thing or two, know
what do you know
what have you (who knows what)
which is which, know
you know

know

verb (used with object), knew, known, know·ing.

verb (used without object), knew, known, know·ing.

noun

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Nearby words

Idioms

Origin of know

know

noun Scot. and North England.

Examples from the Web for know

know

verb knows, knowing, knew (njuː) or known (nəʊn) (mainly tr)

noun

Word Origin for know

know

know

know