1 of 9

Natural Language Processing

By

​

S.V.V.D.Jagadeesh

Sr. Assistant Professor

Dept of Artificial Intelligence & Data Science

​

​

LAKIREDDY BALI REDDY COLLEGE OF ENGINEERING

2 of 9

  • Previously Discussed Topics
  • Session Outcomes
  • Lexical Semantics
  • Word Sense
  • Types of word Senses
  • Polysemy
  • Polynymy
  • Homophones
  • Homographs

​

​

​

​

​

​

​

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

Previously Discussed Topics

LBRCE

NLP

3 of 9

  • Metonymy
  • Relationship between Word Senses
  • Synonymy
  • Antonymy
  • Hypernymy (Is-A Relationship)
  • Hyponymy
  • Meronymy (part-Whole Relationship)
  • Holonymy
  • Semantic Fields

​

​

​

​

​

​

​

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

Previously Discussed Topics

LBRCE

NLP

4 of 9

At the end of this session, Student will be able to:

  • Understand Wordnet(Understand-L2)

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

Session Outcomes

LBRCE

NLP

5 of 9

  • WordNet is a large lexical database developed at Princeton University.
  • It groups words into sets of synonyms called synsets and records relationships between them.
  • WordNet is widely used in NLP for:
  • Word sense disambiguation
  • Semantic similarity
  • Knowledge representation
  • Information retrieval

​

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

WordNet

LBRCE

NLP

6 of 9

  • A synset is a group of words that share the same meaning.
  • Example
  • {car, automobile, auto}
  • All represent the same concept.

​

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

SynSets

LBRCE

NLP

7 of 9

  • WordNet organizes words into a semantic hierarchy.
  • Example hierarchy
  • entity� ↓�physical object� ↓�vehicle� ↓�car
  • Meaning: car is a type of vehicle�vehicle is a type of object

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

WordNet Semantic Hierarchy

LBRCE

NLP

8 of 9

  • WordNet records several lexical relations.
  • Synonymy
  • Example: car = automobile
  • Hypernymy
  • Example: dog → animal
  • Hyponymy
  • Example: animal → dog
  • Meronymy
  • Example: wheel → car

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

WordNet Relations

LBRCE

NLP

9 of 9

  • Previously Discussed Topics
  • Session Outcomes
  • WordNet
  • Synsets
  • WordNet Semantic Similarity
  • WordNet Relations

​

​

​

​

​

​

​

​

​

S.V.V.D.Jagadeesh

Saturday, March 14, 2026

Summary

LBRCE

NLP