Definitions
01subject or theme
A1 · Beginner Countable noun General-service · Academic
n. the main subject that you are talking, writing, or learning about.
n. the subject or theme of a discourse, literary work, or investigation.
日本語:話題※
“The teacher asked us to choose a topic for our final history project.”
“The seminar covered a wide range of topics, from international trade agreements to the sociological impact of urban migration.”
Usage
Often used with the prepositions 'on' or 'of'.
02online discussion
B1 · Intermediate Countable noun Computing Informal
n. a specific conversation or thread on a website or social media page.
n. a specific thread or subject of discussion within an online forum or social media platform.
“I started a new topic on the travel forum to ask for hotel advice.”
“The moderator closed the topic after the discussion devolved into personal attacks that violated the community guidelines.”
03data distribution
C1 · Advanced Countable noun Computing Technical
n. a named channel used to send messages to many people or systems at once.
n. a logical distribution channel in a publish-subscribe messaging pattern, allowing multiple subscribers to receive messages from a single publisher.
“The system sends an alert to the 'security' topic whenever a login fails.”
“By decoupling the producers from the consumers via a message topic, the architecture ensures that high-frequency data bursts do not overwhelm individual services.”
04musical style signifier
C2 · Proficiency Countable noun Music Academic · Technical
n. a musical style or rhythm that reminds the listener of a specific mood or place.
n. a musical unit or style that functions as a signifier, evoking a particular genre, mood, or cultural context.
“The composer used a military topic to make the music sound like a parade.”
“The movement employs a pastoral topic, utilizing oboe melodies and drone basses to evoke a rural landscape.”
Collocations
Common phrases and expressions where native English speakers use the word “topic” in context.
Real-World Examples
“What used to be a row of tabs allowing you to filter your search for things like “News,” “Images,” “Videos,” or “Shopping” is now a row of pill-shaped icons that adds topics to the old filters, which still appear.” Etymology
From Latin topica, from Ancient Greek τοπικός (topikós, “pertaining to a place, local, pertaining to a common place, or topic, topical”), from τόπος (tópos, “a place”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
Related words
Idioms
01. drop the topic
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.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL 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: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
- Frequency
- Common
- Level
- A1 · BeginnerOxford
- Updated
- アルファベット
- 読み方の一覧 →
QR code
englishreference.com/q/topic
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「日本語」「カタカナ語」 data: JMdict (EDRDG), CC BY-SA 4.0
‘외래어’ data: 한국어기초사전 (국립국어원), CC BY-SA 2.0 KR