The Best
Best, Supreme
noun, な adjective, の adjective
The most tall isn't literally the most tall. When you think of something high above the rest, you think of something that is the best.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
かき氷は夏に食べるのが最高です。
Shaved ice is best to eat in summer.
仕事が終わってからのビールは、やっぱり最高だな。
Having a beer after work is the best.
この名曲は何十年も人気があり、J-POPヒストリー上最高の音楽として知られています。
This masterpiece has been popular for decades and is known as the best music in J-pop history.