trigram
C2 (Very Low Frequency / Specialised)Academic, Technical, Specialised
Definition
Meaning
A group of three letters, characters, or consecutive items in a sequence.
In computational linguistics and cryptography, a sequence of three consecutive items from a given text (often letters, syllables, or words), used for statistical analysis or modelling. In Chinese divination (I Ching), a figure composed of three stacked lines (broken or unbroken).
Linguistics
Semantic Notes
The primary use is in linguistics, natural language processing, and cryptography for modelling. The secondary, esoteric meaning relates to the I Ching. There is no connection between these two domains.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are identical.
Connotations
Identical; both primarily technical.
Frequency
Equally rare in both varieties, confined to technical fields.
Vocabulary
Collocations
Grammar
Valency Patterns
Noun + of + trigram (e.g., 'a sequence of trigrams')Adjective + trigram (e.g., 'common trigram')Verb + trigram (e.g., 'generate trigrams')Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “N/A”
Usage
Context Usage
Business
Extremely rare, potentially in data analysis or predictive text software discussions.
Academic
Common in computational linguistics, corpus linguistics, NLP papers, and cryptography research.
Everyday
Virtually never used.
Technical
Core term in NLP, machine learning, and cryptography for language modelling.
Examples
By Part of Speech
verb
British English
- The software will trigram the corpus for analysis.
- We need to trigram these sequences first.
American English
- The algorithm trigrams the input text automatically.
- You should trigram the data before running the model.
adverb
British English
- The data was analysed trigram by trigram.
- N/A
American English
- Process the text trigram-wise for consistency.
- N/A
adjective
British English
- The trigram frequency tables are now complete.
- We observed a trigram-based pattern in the cipher.
American English
- The trigram analysis yielded significant results.
- He prefers a trigram approach to language modelling.
Examples
By CEFR Level
- This word is too difficult for A2 level.
- 'Trigram' is a specialist word you might study at university.
- In computer science, a trigram is a sequence of three items, often used in text prediction.
- The model's accuracy improved significantly after incorporating trigram probability smoothing.
Learning
Memory Aids
Mnemonic
Think of 'TRIangle' with three sides + 'GRAM' as in 'diagram' or 'program' → a 'trigram' is a three-part diagram or program element.
Conceptual Metaphor
BUILDING BLOCK / ATOMIC UNIT (In NLP, trigrams are the fundamental bricks used to build a model of language.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with 'триграмма' (trigramma), which is a direct transliteration but not a common Russian word. In technical contexts, it's simply 'триграмма' or '3-грамма'. In I Ching context, it's 'триграмма'. There is no single-word common Russian equivalent.
Common Mistakes
- Confusing 'trigram' with 'trigraph' (the latter is specifically three letters representing one sound, like 'tch' in 'match').
- Using it in non-technical contexts where 'triad' or 'trio' would be more appropriate.
Practice
Quiz
In which field is the term 'trigram' NOT commonly used?
FAQ
Frequently Asked Questions
A trigram is any sequence of three consecutive items (letters, words). A trigraph is specifically three letters representing one phoneme/sound (e.g., 'eau' in 'beau').
No, it is a highly specialised term used almost exclusively in technical fields like linguistics, computer science, and cryptography.
Yes, in the context of the I Ching (an ancient Chinese divination text), a trigram is a symbol made of three stacked lines (broken or solid), representing fundamental principles.
By analysing vast amounts of text to see which three-letter sequences (trigrams) are most common, software can predict the next likely letter or word, improving autocorrect and predictive text features.