noun

• The lowest part of anything.
  "There’s a hole in her pyjama bottoms."
• The lowest part of anything.
  "In Ireland, where 14.5% of the population are jobless, emigration has climbed steadily since 2008, when Lehman Brothers collapsed and the bottom fell out of the Irish housing market. In the 12 months to April this year, 40,200 Irish passport-holders left, up from 27,700 the previous year, according to the central statistics office. Irish nationals were by far the largest constituent group among emigrants, at almost 53%."
• The lowest part of anything.
• The lowest part of anything.
  "a soda and a bottom of brandy"

verb

• (transitive) To furnish (something) with a bottom.
  "to bottom a chair"
• (transitive) To pour spirits into (a glass to be topped up with soda water).
  "We shall bid that thoughtful waiter place beside him, near and handy, / Large supplies of soda water, tumblers bottomed well with brandy, […]"
• (obsolete) To wind (like a ball of thread etc.).
  "As you vnwinde her loue from him, / Lest it should rauel and be good to none, / You must prouide to bottome it on me."
• (transitive) To establish or found (something) on or upon.
  "But an absurd opinion concerning the king’s hereditary right to the crown does not prejudice one that is rational, and bottomed upon solid principles of law and policy."

adj

• (transgender) Relating to the genitals.
  "bottom dysphoria"