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5 Things You Should Know About Semantics

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In this article, we explore how words map onto their meanings, which means we’re entering into the field of semantics. By the end, you’ll know what semantics is, why it matters, and understand the main principles underlying word meaning. Lucky for you - we’ve summed all that up into 5 easy-to-understand points. So let’s dive in!

  • Definition time

Semantics is the field of study dedicated to the meaning of words in human languages. 

If someone were to tell you they were a semanticist, that could mean a lot of different things. They could be a formal semanticist, a lexical semanticist, or a cognitive semanticist – each of which comes with its own set of methodologies and objects of study. But what they all have in common is that they study how words and meanings map on to each other. In linguistics, we call this form-function mapping. 

Form = the word (e.g. house) 

Function = what it means (e.g. the structure for human habitation)

Semantics research can have many applications – from impacting how we teach computers to process human language or improving how students learn vocabulary more efficiently in a foreign language. Now onto some of the main principles underlying words…

  • Words are mostly arbitrary 

Just in the way that money only has value because we assign it value, our words only carry meaning because we assign them meaning. 

Why did we end up calling trees trees or boxes boxes? The short answer is that we really don’t know, but it seems to be mostly arbitrary. Now, there is some evidence that our brains are wired for certain sounds to indicate certain things to us (e.g. to most people, the sound kiki sounds like it should refer to a spiky object while the sound bobo sounds like it should refer to a round object). But that phenomenon (called Sound Symbolism) doesn’t explain how we get so many languages with different words for the same concepts. 

While we don’t have concrete answers for why certain concepts got the word form assignments they did, we do know something about the how: it all boils down to  conventionalization. Conventionalization is the process by which a word form comes to be associated with a particular meaning through consistent use.

We can all agree that the English word form ‘tree’ is conventionally used to refer to the woody perennial plant we all know and love. So, you would get a lot of confused stares if you just decided to start using the word ‘tree’ to refer to something completely different, like ‘boxes.’ That would be weird and unnecessary – because that form-function pair is highly conventionalized! Humans typically want to understand and be understood in conversation, so it’s efficient for us to rely on these conventionalized form-function mappings to make meaning. While conventionalization is ever-present in how we make meaning with our words, that doesn't mean words and their meanings stay the same over time. That brings us to #3…

  • Word meanings evolve as we use them differently 

Just like the value of currencies change, so do the meanings of our words. 

There’s a famous saying: “I’ll tell you what a word means by the company it keeps.” So, a word might start out with one meaning, but over time, if people are using it in different contexts over time, it’ll accrue a slightly different meaning. For example, the word ‘grab’ used to only mean ‘to seize suddenly with one’s hands,’ but now we use it in all kinds of contexts. For example, ‘grab a taxi’ just means to ‘get’ a taxi. This change in word meaning from something more specific to something more general is called generalization, and it’s quite common across languages. Shifts in word meaning like this often happens through metaphorical use, because we humans use language creatively and innovatively. And this is also how we get multiple meanings for words. ‘Head,’ for example, can refer to the head of a human body, the head of a company, the head of a table…etc. We call this polysemy, or the coexistence of multiple meanings for a given word. 

  • Semantics gives us a framework for defining word relationships

I’m sure you’ve heard of synonyms and antonyms - but did you know there’s a whole bunch of other word relationships out there?! As a field, semantics offers us all kinds of helpful terms and taxonomies for mapping out how words and meanings can relate to one another. For example, Hypernym is what you’d call the umbrella term for a group of other words (e.g. the word ‘fruit’ is the hypernym for the words ‘banana’ and ‘orange’). Our brains actually track these relationships between words, and when building AI systems that use human languages, it all comes down to constructing matrices of precisely these kinds of word relationships.

  • Different languages slice up meaning into different word categories

If you’ve ever learned another language, you know this is true. For example, English has one word for the article ‘the’ – but German has three different words that differ by gender. Spanish has two words to convey different types of ‘being’ (ser, estar), but English has only one. This comes back to the idea that words in any language often have multiple possible meanings. Which leaves our everyday interactions full of ambiguity – and room for endless confusion. And yet we manage to understand each other. Which all comes down to how we make inferences based on context. Which we’ll get into in our next article in this series!

Thanks for reading!

To recap, we learned that semantics is all about how words map to their meanings, and it turns out the relationship between words and their meanings is a lot like the relationship between money and its value. In other words, arbitrary! We also explored how word meanings are notorious shape-shifters that evolve over time as we creatively innovate the ways we use our language through mechanisms like metaphor. We also learned that different languages cut up the semantic space differently, and that semantic knowledge saves the day by giving us concrete terms and methodologies for describing those meaning relationships within and between languages. 

Check what you know about semantics by taking this FUN and short quiz!

If you want to understand how meaning making works is language, semantics isn’t the end of the story. You need to understand pragmatics too!

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Emily Rae Sabo
Written by Emily Rae Sabo

Emily, a Pittsburgh native, is a linguist at Mango Languages whose areas of specialization are the social and cognitive factors that impact bilingual language processing and production. Having studied 7 languages and lived in various countries abroad, she sees multilingualism—and the cultural diversity that accompanies it—as the coolest of superpowers. Complementary to her work at Mango, Emily is a Lecturer of Spanish at the University of Tennessee, a Producer of the We Are What We Speak docu-series, and get this...a story-telling standup comedian!

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