This is the 885th most frequent Persian word.
بلند
Tall; high; loud.
In this sentence, 'بلند' means 'loud' and is used to describe the quality of the sound of a voice.
او صدای بلند داشت.
He had a loud voice.
Here, 'بلند' means 'tall' and describes the height of the subject, which is the building.
او ساختمان بلند را دوست دارد.
She likes tall buildings.
In this context, 'بلند' implies 'long' in time and refers to the extended duration of the conversation.