Polysemy

Polysemy occurs when a single word form has multiple related meanings connected by shared semantic features or metaphorical extension. It is pervasive in English — the more frequent a word, the more polysemous it tends to be — and represents a major challenge for L2 learners.

Examples

The verb run:

Meaning	Example
Move quickly on foot	She runs every morning.
Operate/manage	He runs a small business.
Function	The engine runs smoothly.
Extend in space	The road runs along the coast.
Flow	Tears ran down her face.
Last/continue	The show runs for two hours.

These meanings are related — they share a core semantic thread of continuous movement or progression. This distinguishes polysemy from Homonymy, where meanings are unrelated.

Polysemy vs Homonymy

Feature	Polysemy	Homonymy
Meanings	Related (shared semantic core)	Unrelated (historically separate words)
Etymology	Single origin	Different origins that converged
Example	mouth of a person / mouth of a river	bank (financial) / bank (river)
Dictionary treatment	One entry, multiple senses	Separate entries

The boundary is not always clear-cut. Synchronic speakers may not perceive a historical connection that etymologists can trace, and dictionaries vary in their treatment.

Why Polysemy Matters for L2 Learners

1. One-meaning assumption: learners who encounter run a business after learning run = move fast may fail to connect the new meaning, treating it as a different word or simply not comprehending it
2. Frequency effect: the most frequent English words (get, take, make, run, set, go, put) are among the most polysemous — learners meet them early but continue encountering new senses indefinitely
3. Transfer errors: learners may assume polysemy patterns match their L1, producing errors when they do not (e.g., in Vietnamese, the same word may not cover the same range of metaphorical extensions)
4. Collocation dependency: different senses often require different collocations — run a bath vs run a risk vs run a fever — making each sense partly a new learning task (see Collocation)

Core Meaning Approach

One teaching strategy, advocated by researchers like Verspoor and Lowie (2003), is to teach a core meaning (or prototype) from which other senses extend through metaphor or metonymy. For run, the core involves continuous forward movement; other senses are metaphorical extensions of this. This gives learners a cognitive framework for encountering and making sense of new meanings.

Teaching Implications

• Do not assume that teaching one sense of a word gives learners access to others — polysemous senses must be explicitly taught or noticed
• Use Concordance Lines to show the range of meanings in authentic context
• Group related senses together and make the semantic connections explicit
• Recognise that Vocabulary Depth for high-frequency polysemous words develops over years of exposure
• Phrasal verbs (Phrasal Verb) are an extreme case of polysemy — look up (search for information), look up (raise eyes), look up (improve) — and need similar treatment