a.

1. 有彈性的，有彈力的
   Rubber is elastic.

   橡膠有彈性。

2. 靈活的，可伸縮的
   My plans are fairly elastic.

   我的計畫相當有彈性。

3. （心情）能恢復的；開朗的
   Don't worry about him; he is a cheerful and elastic man.

   別為他擔心；他是個快活開朗的人。

n.

1. 橡皮帶，鬆緊帶；橡皮圈[U][C]
   It snapped back like a piece of elastic.

   它像一條橡皮帶那樣迅速彈回。

adj.

1. able to resume normal shape spontaneously after being stretched or squeezed.
2. flexible and adaptable:
   the definition is elastic.
   ▸Economics  (of demand or supply) sensitive to changes in price or income.
3. Physics  (of a collision) involving no decrease of kinetic energy.

n.