pushdown

• Audio (US):

  (file)

From push +‎ down; by analogy with a spring-loaded stack of plates in a cafeteria.

pushdown (not comparable)

1. (computing) Describing a stack in which items are removed in a LIFO manner from the end at which they were added.

pushdown (plural pushdowns)

1. A pushdown automaton.
   • 2003, Wilfried Brauer, Hartmut Ehrig, Juhani Karhumäki, Formal and Natural Computing: Essays:

     Since indexed grammars are context-free grammars with pushdowns, the generalization of Thatcher's result shows that they generate the yields of the tree languages recognized by deterministic pushdown tree automata.

Deverbal from push down.

pushdown (plural pushdowns)

1. (bodybuilding) An exercise that requires one to push weight downward.
   • (Can we date this quote?), Greg Merritt, “Go Beyond Failure with Dropsets”, in Muscle & Fitness‎^[1]:

     Machine exercises with weight stacks, like pushdowns or pulldowns, are ideal for cranking out more than three drops because all you need to do is insert the pin in a higher (lighter) slot each time.

pushdown (not comparable)

1. Used by being pushed down.
   • 2008 September 1, Charlie Brooker, “I am increasingly concerned that at the centre of my soul lurks a terrifying blankness. Any suggestions?”, in Alan Rusbridger, editor, The Guardian‎^[2], London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 9 November 2020, page 5, column 2:

     [T]he unfortunate few who suffer from it [ejaculatory anhedonia] are incapable of deriving any pleasure whatsoever from orgasms. They make a bit of mess while staring impassively into the middle distance, and that's it. Like the human equivalent of a pushdown soap-dispenser.

   • 2018 March 19, Maxine Builder, “How to Organize Your Kitchen and Pantry, According to Professional Organizers”, in The Strategist‎^[3], New York, N.Y.: New York Media, →ISSN, →OCLC, archived from the original on 21 March 2018:

     The containers we always use for those are the OXO ones that have the pushdown button, so I think it probably does stay fresher than flour in a paper bag, and in that way, it works.

   • 2021 April 21, Helen Wilson-Beevers, “Peace Out: We tried the US skincare brand that’s TikTok-famous for its pore strips”, in The Independent‎^[4], London: Independent News & Media, →ISSN, →OCLC, archived from the original on 4 February 2022:

     This 30ml serum bottle has a pushdown release nozzle applicator.