Definition of declining in English:
 declining
adjectivedɪˈklʌɪnɪŋdəˈklaɪnɪŋ
1Becoming smaller, fewer, or less; decreasing.
 my firm's clients were reporting declining sales
- 1.1 Diminishing in strength or quality; deteriorating.
 he went back to Britain to spend his declining years
 
  Definition of declining in US English:
 declining
adjectivedəˈklaɪnɪŋdəˈklīniNG
1Becoming smaller, fewer, or less; decreasing.
 my firm's clients were reporting declining sales
- 1.1 Diminishing in strength or quality; deteriorating.
 he went back to Britain to spend his declining years