What does tacit mean?
Tacit is an adjective for something that is understood, intended, or recognized without being stated directly. It often describes agreement, approval, knowledge, or expectations conveyed through shared assumptions, customary practice, or context rather than an explicit declaration. A team may proceed because a leader has given tacit approval, while an experienced craftsperson may pass tacit knowledge to an apprentice without putting every detail into words. The word is especially common in formal, academic, legal, and diplomatic writing, but it is useful in ordinary description whenever unspoken understanding matters. Its force is subtle: tacitness does not necessarily mean that someone deliberately said nothing, nor does it imply secrecy. Rather, the meaning is available through implication and convention. Because explicit statements can be disputed or forgotten, tacit understanding often points to social or practical realities that have never been formally articulated. For readers, recognizing the adjective helps distinguish what has been clearly agreed from what is merely strongly implied.
adjectiveUnderstood, intended, or recognized without being stated directly in words. It often refers to agreement, knowledge, approval, or expectations conveyed through implication or shared convention.
- Understood or intended without being stated directly in words.
- Existing or operating through unwritten conventions, shared assumptions, or implied agreement rather than explicit declaration.
"The committee's decision to proceed conveyed tacit approval of the proposal."
"The committee's decision to proceed conveyed tacit approval of the proposal."
"Generations of apprentices passed on tacit knowledge that was never written down."
From Latin tacitus, meaning “silent,” tacit still keeps a secret: it names what can be understood without being said.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tacit come from?
The adjective entered English in the early 16th century from Latin tacitus, “silent,” originally the past participle of tacere, “to be silent.” Latin tacitus developed the meaning “unspoken” or “understood by implication,” which is the sense preserved in English today. English taciturn shares the Latin source, while French tacite continues the same Latin family.
Related word forms
How tacit is actually used
Formal and especially common in academic, legal, and diplomatic contexts. It describes meaning conveyed by implication or convention, not necessarily by deliberate silence; in some uses, it can suggest that an agreement or recognition has not been openly acknowledged.
Easily confused with tacit
Tacit means implied or understood without being stated, whereas taciturn describes a person who is reserved or tends to say little.