Definition of bolster
(Entry 1 of 2)
1 : a long pillow or cushion
2 : a structural part designed to eliminate friction or provide support or bearing (see bearing sense 5)
bolster
verbDefinition of bolster (Entry 2 of 2)
2 : to give a boost to
news that bolstered his spirits
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Time Traveler for bolster
The first known use of bolster was before the 12th century
See more words from the same century