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plank

plank /ˈplæŋk/ noun
plural planks
plank
/ˈplæŋk/
noun
plural planks
Britannica Dictionary definition of PLANK
[count]
: a long, thick board that is used especially in building something
formal : one of the official beliefs and goals of an organization (such as a political party)
compare platform

walk the plank

see 1walk