DuckCorp Dico

Found 2 definitions

1.                 From English-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2022.11.18:
                   
   
   
                   
                     
   gain //ɡeɪn// <n>
   1. 利得, 増幅率
   factor by which signal is multiplied
   2. 進展, 進歩
   what one gains (profit)
   
                   
                 

2.                 From English-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2022.11.18:
                   
   
   
                   
                     
   gain //ɡeɪn// <v>
   増強する, 獲得する
   acquire