Oxford Advanced American Dictionary

Definition of tall adjective from the Oxford Advanced Learner's Dictionary

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tall

adjective
tall pronunciation English tɔːl tall pronunciation American tɔːl
taller, tallest
 
1 (of a person, building, tree, etc.) having a greater than average heightShe's tall and thin.tall chimneysthe tallest building in the worlda tall glass of iced tea
Opposite
short2 used to describe or ask about the height of somebody/somethingHow tall are you?He's six feet tall and weighs 200 pounds.tallness
tallness pronunciation English tɔːlnəs tallness pronunciation American tɔːlnəs
noun [uncountable]
Idioms

stand tall

(especially North American English) to show that you are proud and able to deal with anything

be a tall order

(informal) to be very difficult to do
 more at great/tall oaks from little acorns grow at oak, walk tall at walk verb
Usage notesUsage note: high / tallHigh is used to talk about the measurement from the bottom to the top of something: The fence is over five metres high. ◇ He has climbed some of the world’s highest mountains. You also use high to describe the distance of something from the ground: How high was the plane when the engine failed?Tall is used instead of high to talk about people: My brother’s much taller than me. Tall is also used for things that are high and narrow such as trees: She ordered cold beer in a tall glass. ◇ tall factory chimneys. Buildings can be high or tall.