Word
tangent
Phoneticstan·gent, stress on the first syllable
US/ˈtændʒənt/
UK/tˈændʒənt/
Definitions
01conversation/topic
B2 · Upper Intermediate Countable noun Informal
n. a sudden change to a different subject that is only slightly related to what you were talking about.
n. a sudden divergence from a main line of thought or course of action into a marginally related topic.
“The professor went off on a long tangent about his cat during the history lecture.”
“The meeting was productive until the CEO went off on a tangent regarding his recent holiday, which delayed the final vote by twenty minutes.”
Usage
Commonly used in the phrase 'go off on a tangent'.
Synonyms
02geometry
C1 · Advanced Countable noun Mathematics Technical
n. a straight line that touches a curve at one point but does not cross it.
n. a straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point.
“The teacher asked us to draw a tangent to the circle at point P.”
“The student calculated the slope of the tangent to the curve at the specific point where the derivative was zero.”
03trigonometry
C1 · Advanced Countable noun Mathematics Technical
n. a mathematical function used to calculate the relationship between the sides of a triangle.
n. a trigonometric function that represents the ratio of the opposite side to the adjacent side of a right-angled triangle.
“You can find the height of the tree if you know the angle and the tangent.”
“In the final exam, students were required to solve for the unknown angle using the inverse tangent function.”
Synonyms
04art/composition
C2 · Proficiency Countable noun Theater Technical
n. a mistake in a drawing where two lines touch in a way that looks confusing or flat.
n. an unintended visual relationship created when two edges or lines touch, often resulting in a loss of depth or clarity in the composition.
“The artist moved the tree in the painting to avoid a tangent with the character's head.”
“The illustrator carefully adjusted the character's silhouette to eliminate a distracting tangent where the sword edge met the background mountain range.”
05music/clavichord
C2 · Proficiency Countable noun Music Technical
n. a small metal part in an old keyboard instrument that hits the strings to make sound.
n. a small brass blade in a clavichord that strikes the string to produce sound and remains in contact with it to determine the pitch.
“The musician adjusted the tangent to make sure the note sounded clear.”
“Unlike a piano hammer, the clavichord tangent stays against the string, allowing the player to influence the sound through pressure.”
06touching a curve
C1 · Advanced Mathematics Technical
adj. describing a line that touches a curve at one point.
adj. meeting a curve or surface at a point and having at that point the same direction as the curve or surface.
“The tangent line just barely touches the edge of the circle.”
“The physicist explained that the velocity vector is always tangent to the path of the moving particle.”
Real-World Examples
“She nods, sort of, before going off on a curious and revealing tangent.” “She is supposed to be talking about her album and she has been going off on all these tangents!” Etymology
Borrowed from Latin tangentem, the accusative of tangēns (“touching”) (in the phrase līnea tangēns (“a touching line”)), the present participle of the verb tangō (“touch”, verb), from Proto-Italic tangō, from Proto-Indo-European teh₂g- (“to touch”). Cognate with Old English þaccian (“to touch lightly, pat, stroke”). More at thack, thwack.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
Related words
Idioms
Domains
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
- Frequency
- Occasional
- Level
- C1 · Advanced
- Updated
- アルファベット
- 読み方の一覧 →
QR code
englishreference.com/q/tangent