Definition of "kapok" []

• A silky fiber obtained from the fruit of the silk-cotton tree and used for insulation and as padding in pillows, mattresses, and life preservers. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But I wonder if the kapok is a hybrid of some kind or if they've treated it somehow to make it hypoallergenic, because I have a kapok allergy myself."
• "The kapok is the city flower and the kapok tree is the city tree of Guangzhou."
• "The kapok is a rain forest tree from Tropical America, and the pillow is stuffed with fluff from its fruits."