一番（いちばん）— most; number one
あの 山 が 一番 高い です。
That mountain is the tallest.
一番いちばん
most; number one
いちばん
accent [2]In detail
Words
あのanothat
山yamamountain
がga(subject marker)
一番ichibanmost; number one
高いtakaitall
ですdesu(polite sentence ending)
Kanji
一イチ・
番バンturn; number in a sequence
一番 can mean number one. Before an adjective it expresses the highest degree: 一番高い is “the tallest” or “the most expensive,” depending on context.
Coco-sensei