a.

1. 便于携带的，手提式的；轻便的
   He found that little TV extremely portable.

   他觉得那台小小的电视机携带极其方便。

   I bought my son a portable typewriter.

   我给儿子买了一台手提式打字机。

n.

1. 手提式制品；手提式打字机（或电脑，收音机，电视机等）[C]
   My sister's TV is a portable.

   我妹妹的电视机是手提式的。

adj.

1. able to be easily carried or moved.
2. (of a loan or pension) capable of being transferred or adapted in altered circumstances.
3. Computing  (of software) able to be ported.

n.