No one memorizes dictionaries for language learning.
There are frequency lists of vocabulary words for languages: basically some words are used more frequently than others so memorizing the most common 1000-3000 words is enough to get very high comprehension rates for everyday conversation and reading.
There are frequency lists of vocabulary words for languages: basically some words are used more frequently than others so memorizing the most common 1000-3000 words is enough to get very high comprehension rates for everyday conversation and reading.
https://blog.fluent-forever.com/vocabulary/