tallest
adj. A1 Beginner US //ˈtɔɫɪst// UK //tˈɔːləst// tallest
adj. the person or thing that has the most height compared to all others in a group.
adj. the superlative form of 'tall'; indicates the maximum vertical extent within a specific set.
He is the tallest student in our class.
The architect designed the tallest skyscraper in the city to serve as a landmark for miles around.
While several peaks in the range are impressive, this mountain is the tallest, reaching an elevation that remains snow-capped even during the height of summer.
Usage
Superlative form; almost always preceded by the definite article 'the'.
Pitfall
He is the most tallest boy.He is the tallest boy.One-syllable adjectives form the superlative by adding '-est'; using 'most' as well is a double superlative error.