1Improvement or progress in a skill or ability, gained through practice or experience.
毎日練習したおかげで、英会話が上達した。
Thanks to daily practice, my conversational English improved.
ピアノの腕が上達するには時間がかかる。
It takes time for piano skills to improve.
彼女の描く絵はここ数年で目に見えて上達した。
Her drawings have visibly improved over the past few years.
短期で英語力を上達させるのは難しい。
It's difficult to improve one's English proficiency in a short time.
2An archaic/administrative usage referring to opinions or matters of the common people being conveyed up to those of higher rank (opposite of 下達); rarely used in modern Japanese.
住民の苦情を市役所に上達させるために、委員会が発足した。
A committee was formed to bring residents' complaints up to city hall.