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A long narrow pillow or cushion.
tr.v. bol·stered, bol·ster·ing, bol·sters
1. To support or prop up with or as if with a long narrow pillow or cushion.
2. To buoy up or hearten: Visitors bolstered the patient's morale.

[Middle English, from Old English; see bhelgh- in Indo-European roots.]

bol′ster·er n.
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References in periodicals archive ?
She and co-star Lolita Davidovich turned into each other's greatest advisers and bolsterers during the shoot, she said.