a.

1. 较小的；更少的；次要的[B]
   I was very tired. To a lesser extent so was he.

   我累极了。他也很累，但比我稍好些。

   Don't waste time on these lesser matters.

   别把时间浪费在那些无关紧要的事情上。

ad.

1. 较少，不很
   one of the lesser-known modern poets

   不太出名的现代诗人之一

adj.