Semantics

Also called Word meaning, Semantic knowledge, Lexical semantics

What words mean and how they connect to each other. A word you can say but can't define is only half learned.

What it is

Semantics is meaning: what a word refers to, what it doesn't, and how it sits among other words. "Dog" isn't just a label for the one at home; it's a category that includes a poodle and excludes a cat, sits inside "animal", and links to "bark", "lead" and "walk". That web of connections is semantic knowledge, and it's what lets a person understand a new sentence rather than just recognise a familiar one.

It's distinct from having a big vocabulary. A child can produce hundreds of words with thin meaning behind them, and a child with fewer words can hold each one richly. Therapists assess both.

Who it can help

Semantic difficulties show up in children with developmental language disorder, where words are learned slowly and stored loosely, in word-finding difficulties of any cause, and in some kinds of dementia where meaning itself erodes. In AAC it's the quiet reason a symbol board fails: a symbol is a picture, and a picture of a cup means one cup, not cup-ness, unless someone teaches the meaning around it.

Understanding semantics also helps anyone teaching vocabulary, which is every parent and every teacher. It is not a specialist concern.

How it works

Children learn word meanings through repeated exposure across contexts. Hearing "cup" at the table, the sink and the shop is what builds the category; hearing it in one place builds a label. Early meanings are often too wide ("dog" for every animal) or too narrow ("dog" only for the family dog), and both are normal stages.

Meaning is stored as a network. Words connect by category (apple, banana, fruit), by function (apple, eat), by association (apple, teacher), by sound (apple, ample) and by appearance. Word-finding works by activating the network, which is why a person who can't reach "apple" can often tell you it's a fruit, red and crunchy: the meaning is there, the name isn't. Colourful semantics is a therapy approach that uses these roles (who, doing what, to what, where) to scaffold sentences.

Getting started

Teach words in depth, not just in number. When a new word comes up, say what it is, what group it belongs to, what it does and what it's like. "A whisk. It's a kitchen thing. You use it to mix. It's metal and it spins." Four connections instead of one.

Sort things. Real objects, pictures or symbol cards: put the food together, the animals together, then re-sort by colour or size. Talk about why. Play odd-one-out and ask "why doesn't it belong?" rather than just which one.

On an AAC board, look at how the vocabulary is grouped (vocabulary organisation). If related words live near each other, the layout itself teaches semantics; if they don't, the person has to hold the map in their head.

Where to get help

Speech and Language UK has practical resources for building vocabulary at home and school. RADLD explains developmental language disorder, where semantic difficulties are common. A speech and language therapist can tell you whether the issue is meaning, retrieval or both, which changes what you do.