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A smoothie is a blended drink made from fruit, vegetables, or both, plus a liquid base and optional ingredients that change the texture or make the drink more filling. The key parts of the definition are blending and texture. A smoothie is meant to be thick, smooth, and drinkable, not thin like juice and not usually as dessert-heavy as a milkshake.
That is why the best definition is both formal and practical. It tells you what a smoothie is made from, but it also tells you how the drink behaves in the glass. If you want the plain-language meaning instead of the definition version, what does smoothie mean is the easier read.
Quick Answer
The definition of smoothie is a thick blended beverage made from fruit, vegetables, or both, usually combined with a liquid like milk, juice, water, or yogurt. It may also include add-ins such as ice, seeds, nut butter, oats, or protein powder.
What separates a smoothie from nearby drinks is that it is blended to keep body and texture, rather than strained down like juice.
What It Is / When to Use It
In real kitchen use, a smoothie is a category rather than one fixed recipe. The definition covers a simple berry-banana drink, a green smoothie, a protein smoothie, and even some thicker bowl-style bases, as long as the core idea stays the same: blended produce plus liquid, with some real body left in the drink.
That definition also helps you sort out what does not quite fit. Juice is usually thinner and more filtered. A milkshake usually leans more on ice cream and dessert texture. A protein shake may or may not count as a smoothie depending on whether produce still matters to the drink.
Menus can blur those lines, but the definition still helps. If the drink is built around blended fruit or vegetables and pours with more body than juice, smoothie is the right word most of the time.
Substitutes / Swaps
If a drink does not fit the full definition cleanly, use the more precise label instead. Call it juice if it is thin and strained. Call it a milkshake if dessert is the point. Call it a protein shake if powder and supplement function dominate the drink.
Within smoothie territory, though, there is still room to swap ingredients freely. The definition does not require banana, yogurt, dairy, or even sweetness. It requires a blended drink with a smooth, thicker texture and a produce-based identity.
That is why the guide to what is meant by smoothie, the page on smoothie drink meaning, and the list of smoothie types all work as useful follow-ups. The definition gives the boundary, then those pages help you see the range inside it.
Prep Tips
When you are trying to define a borderline drink, look at process, texture, and ingredient balance together. A smoothie should be blended. It should have enough body that it feels thicker than juice. And it should still be recognizably built around fruit, vegetables, or both.
That means add-ins do not cancel the definition unless they take over. Oats, nut butter, protein, yogurt, seeds, and greens can all belong in a smoothie. The drink only starts slipping away from the definition when the produce becomes an afterthought.
If you want the ingredient breakdown that sits underneath the definition, read what smoothies are usually made of and what smoothies consist of.
Storage / Reheat / Freeze
The definition of smoothie has broadened over time because the category itself has expanded. What used to sound like a narrower fruit drink now covers wellness blends, green smoothies, protein smoothies, and cafe-style smoothie bowls.
Even so, the center still holds. A smoothie is still best defined as a smooth blended drink with body, built from produce and liquid.
Frequently Asked Questions
Does a smoothie have to contain fruit?
Usually fruit is involved, but some smoothies lean more heavily on vegetables as long as the drink still fits the blended, smooth, produce-based definition.
Is yogurt required in the definition of a smoothie?
No. Yogurt is common, but it is optional.
What is the biggest difference between juice and a smoothie?
A smoothie is blended and keeps more body, while juice is usually thinner and more filtered.
Can a smoothie include protein powder?
Yes. Protein powder can be part of a smoothie as long as the drink is still built around blended produce rather than acting only as a supplement shake.
Are smoothie bowls included in the smoothie category?
Yes. They use the same blended base, but with less liquid and a thicker spoonable texture.
For the word itself, read what smoothie means in plain language. For the timeline behind the drink, where smoothies come from gives the origin angle.
