noun
a long, flat strip of squared wood or metal used to hold something in place or as a fastening against a wall
verb
to strengthen or fasten (something) with battens
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The carpenter used a batten to secure the boards together.
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Can you pass me that batten over there?
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I'm going to batten down the hatches before the storm hits.
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She had to batten down her emotions to stay focused during the presentation.