Definition of "bladder"

bladder

/ˈblædə/

noun
plural bladders
1. (zoology) A flexible sac that can expand and contract and that holds liquids or gases.
2. (anatomy) Specifically, the urinary bladder.
3. (botany) A hollow, inflatable organ of a plant.
4. The inflatable bag inside various balls used in sports, such as footballs and rugby balls.
5. A sealed plastic bag that contains wine and is usually packaged in a cask.
6. (figurative) Anything inflated, empty, or unsound.
  Quotations
  to swim with bladders of philosophy
  1711, Anthony Ashley-Cooper, 3rd Earl of Shaftesbury, “Sensus Communis”, in Characteristicks of Men, Manners, Opinions, Times
verb
third-person singular simple present bladders, present participle bladdering, simple past and past participle bladdered
1. To swell out like a bladder with air; to inflate.
  Quotations
  bladder'd up with pride of his own mcrit
  1610, Giles Fletcher, Christ's Victorie and Triumph, in Heaven, in Earth, over and after Death
2. (transitive) To store or put up in bladders.