What does declaration mean?
A declaration is a formal, explicit statement — one made openly, officially, and usually with intent that it be recognized as binding or significant. The word spans contexts from world history to everyday paperwork: nations issue declarations of war or independence, governments publish joint declarations, travelers complete customs declarations, and individuals make declarations of love or innocence. What unites these uses is the sense of deliberate, public commitment — a declaration is never a mere aside but a considered assertion meant to carry weight. Derived from the Latin declarare, meaning "to make clear," the noun entered English via Old French in the late Middle Ages and has long been central to law, where it can denote a formal statement under oath. Because of its gravity, choosing "declaration" over lighter words like "comment" or "remark" signals importance, formality, and finality, making it a precise and powerful choice in both writing and speech.
A formal, explicit, or official statement or announcement, especially one made publicly or in writing.
"The two countries issued a joint declaration on climate policy."
Often appears in fixed phrases such as 'declaration of independence,' 'declaration of war,' and 'customs declaration.'
An assertion or open avowal of a feeling, belief, or intention.
"His heartfelt declaration of devotion won her over at last."
In law or taxation: a formal written statement of facts, such as one made under oath or to customs authorities.
"Passengers must complete a declaration listing any goods subject to duty."
In computing: a statement in source code that specifies the name, type, or properties of an identifier.
"Add a function declaration to the header file before implementing it."
Standard regular plural. Commonly used when referring to multiple formal statements, e.g. historical documents or repeated filings.
"The archive preserves the declarations signed by delegates from each colony."
The Declaration of Independence is technically just an extremely consequential public announcement — proof that a single formal statement can found a nation.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of declaration
Declaration comes from the Latin declarare, formed from de- (intensive) plus clarare ("to make clear"), itself from clarus, meaning "clear" or "bright." The word passed into English through Old French declaracion, first appearing in the late Middle Ages, initially in legal contexts describing a plaintiff's formal statement of claim. Its Latin root also gives English words like clarify, clear, and declare, making declaration part of a broad family of terms about making things plain and evident.
Related word forms
How declaration is actually used
"Declaration" carries a formal, weighty register — it implies deliberateness and consequence rather than casual remark. In legal, political, and diplomatic contexts it denotes an official document or act; in personal contexts (a declaration of love) it retains the sense of solemnity. The word is standard across British and American English with no regional variation.
Easily confused with declaration
Deceleration means slowing down (the opposite of acceleration), while declaration is a formal statement; the two differ by only a few letters but share nothing in meaning.