altos
/AL-tohs/
tall

When describing structures, 'altos' means tall.
altos(adjective)
tall
?describing people or structures
,high
?describing elevation or position
loud
?describing sound/volume
,upper
?as in, upper levels
📝 In Action
Mis hermanos son muy altos, miden casi dos metros.
A1My brothers are very tall; they measure almost two meters.
Los árboles de este parque son los más altos de la ciudad.
A2The trees in this park are the highest (tallest) in the city.
El volumen de la música estaba demasiado alto. (Note: 'alto' acts as an adverb here, but the core meaning is the same.)
B1The volume of the music was too loud.
💡 Grammar Points
Adjective Agreement
Since 'altos' ends in '-os,' it must be used with masculine nouns that are plural (more than one). For example, 'los chicos altos' (the tall boys).
The Base Form
The base form of this word is 'alto' (singular, masculine). Remember to change the ending when describing feminine things ('altas') or a single person ('alto').
❌ Common Pitfalls
Using the Singular Form
Mistake: "Los árboles es alto."
Correction: Los árboles son altos. (Since you are talking about multiple trees, the adjective must also be plural.)
⭐ Usage Tips
Height vs. Price
'Altos' works for both physical height (people, mountains) and abstract height (prices, expectations, volume). Context will make the meaning clear!

As a noun, 'altos' refers to the upper floors of a building.
altos(noun)
upper floors
?of a building
,heights
?geographic or abstract
stops
?rare, related to the verb 'parar'
📝 In Action
Mis tíos viven en los altos de la casa de mi abuela.
B1My aunt and uncle live in the upper floors (or upstairs apartment) of my grandmother's house.
Desde estos altos se puede ver toda la ciudad.
B2From these heights, you can see the whole city.
💡 Grammar Points
Always Plural
When used as a noun meaning 'upper floors' or 'heights,' it almost always stays in the plural form, 'los altos.'
✏️ Quick Practice
💡 Quick Quiz: altos
Question 1 of 2
Which sentence correctly uses 'altos' to describe the price of goods?
📚 More Resources
Frequently Asked Questions
How do I know if 'altos' means 'tall' or 'high'?
If you are describing a person, it almost always means 'tall.' If you are describing an abstract concept (like a price or a sound), it means 'high' or 'loud.' Context is key!
Is 'altos' ever used as a command?
No, not 'altos.' The command form for 'stop' is '¡Alto!' (singular, used as an interjection/command), or sometimes '¡Paren!' (the verb 'to stop').