the definition of "batten"

[Zishuli]

This is a question in Test # GMAT/W52:

5. v. to gain

(a) sunder
(b) rout
(c) parley
(d) batten

The given answer is (d) "batten".

According to the dictionary I have looked up to, the definition of the verb " batten " is as below:

v.intr.
1. To become fat.
2. To thrive and prosper, especially at another's expense
v.tr.
To fatten; overfeed.
Nautical To furnish, fasten, or secure with battens

So, I found the given answer is questionable. Furthermore, none of the provided options seems to be acceptable.

[Gray]

"Secure" is a synonym for "batten".
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[Kitosdad]

" Batten down the hatches ".

A nautical term, meaning to make all cargo on the ship secure, and to close and fasten all open hatchways or points of entry for seawater in heavy seas.

Hope that is of some help.
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