Computational Linguistics

The Web of Meaning

WordNet is more than a dictionary. It's a massive lexical database where words are interlinked by their meanings, creating a structured map of human language used to teach computers how to understand us.

Structured Hierarchical Taxonomy

Words aren't islands. In WordNet, they are organized into Synsets (sets of synonyms). These synsets are linked by specific rules.

The most fundamental relationship is the "Is-A" relationship. We move from specific terms (Hyponyms) to general terms (Hypernyms).

Key Insight

"Dog" is a hyponym of "Animal".
"Animal" is a hypernym of "Dog".

Interactive Explorer
Hypernym (General) Animal
Living organism
Mid-Level Mammal
Warm-blooded vertebrate
Hyponym (Specific) Dog
Domesticated carnivore

Click any box above to trace the path

The Vocabulary of Connections

WordNet maps the "intricate web" of language through specific semantic relationship types.

Parts & Wholes

Meronym: A part of something.
"Finger" is a meronym of "Hand"

Holonym: The whole containing the part.
"Hand" is a holonym of "Finger"

Relationship Composition

Opposites

Antonyms: Words with opposite meanings. Crucial for understanding contrast.

Hot Cold

*Also helps define sentiment (Good vs Bad).

Relationship Contrast

Synsets

The building blocks of WordNet. Groups of synonymous words that represent a single unique concept.

Synset Concept: "Car" { automobile, motorcar, machine, auto }
Relationship Equivalence

Powering Modern AI

Traditional search engines match exact keywords. WordNet allows Semantic Search.

  • If you search for "Big Cats", WordNet knows to look for "Lions" and "Tigers" (Hyponyms).
  • It helps disambiguate words like "Jaguar" (Car vs Animal) based on context.

WordNet identifies the "backbone" concepts of a text to create concise summaries.

Extractive

Selecting key existing sentences based on frequent semantic concepts.

Abstractive

Generating new sentences that convey the core meaning found via WordNet relations.

Used to gauge public opinion (reviews, social media). WordNet helps by utilizing Antonyms (Good vs Bad) to calculate polarity scores, even when the language is complex or sarcastic.

Knowledge Check

Test your understanding of the WordNet concepts.

1. If "Dog" is a specific type of "Animal", what is "Animal" in relation to "Dog"?