Key — Meaning, Definition & Synonyms
Meaning & Definition of Key
Key (noun)
- a usually metal instrument that is used to open a lock or to start or access a mechanism
- something that resembles a key in form or function
- a means of gaining or preventing entrance, possession, or control
- a low island or reef; specifically, any of the coral islets off the southern coast of Florida
- a kilogram especially of marijuana or heroin
Key (adjective)
- extremely or crucially important
Key (verb)
- to lock or secure with or as if with a key, fasten
- to secure (something, as a pulley on a shaft) by a key
- to finish off (an arch) by inserting a keystone
Key (adjective) — Senses, Synonyms & Antonyms
-
coming before all others in importance
"maintains that Sir Isaac Newton remains the key figure in physical science"
-
of the greatest possible importance
"first—and this is key—I wasn't even there that evening"
Key (noun) — Senses, Synonyms & Antonyms
-
an explanatory list of the symbols on a map or chart
"in order to know what those dotted lines represent, you'll need to look at the key"
-
something that allows someone to achieve a desired goal
"a good education is the key to success"
-
the means or right of entering or participating in
"he had found the key to her heart"
Key (verb) — Senses, Synonyms & Antonyms
-
to bring to a state free of conflicts, inconsistencies, or differences
"her response was perfectly keyed to the situation"
Synonyms, Thesaurus & Another Word for Key
The most common words with a similar meaning to Key:
Antonyms & Opposite Words for Key
Words with the opposite meaning of Key:
Near Antonyms of Key
Word Forms of Key
Origin & Etymology of Key
Middle English, from Old English cǣg; akin to Old Frisian kēi key
First known use: before 12th century
Vocabulary Lists & Topics for Key
- CEFR level: A1 English Vocabulary — Page 9
- Topics: Home & Daily Life
Words & Phrases Containing Key
Frequently Asked Questions about Key
What does "Key" mean?
"Key" means a usually metal instrument that is used to open a lock or to start or access a mechanism. As an a noun, an adjective and a verb, it is defined as: a usually metal instrument that is used to open a lock or to start or access a mechanism. It has 6 distinct senses.
What is another word for "Key"?
Other words for "Key" include arch, big, capital, cardinal, central, chief, dominant and first. The best synonym depends on which meaning of "Key" you intend.
What are different ways to say "Key"?
There are 165 words and phrases with a similar meaning to "Key". Common alternatives include arch, big, capital, cardinal, central, chief, dominant, first, foremost and grand.
What is the opposite of "Key"?
Antonyms of "Key" include last, least and disharmonize. Near antonyms include inconsequential, inconsiderable, insignificant and minor.
How do you use "Key" in a sentence?
Examples of "Key" in a sentence: "maintains that Sir Isaac Newton remains the key figure in physical science"; "first—and this is key—I wasn't even there that evening"; "in order to know what those dotted lines represent, you'll need to look at the key".
Is "Key" a noun, verb, or adjective?
"Key" can be used as a noun, an adjective and a verb, depending on the context.
Is "Key" useful for IELTS, TOEFL, and other English exams?
As an A1-level word, "Key" is typical of Cambridge A1 Movers (Young Learners), TOEIC Listening & Reading 120+.
How do you pronounce "Key"?
"Key" is pronounced /ˈkē/.