pushdown

1. not comparablecomputingDescribing a stack in which items are removed in a LIFO manner from the end at which they were added.

plural pushdowns

1. countableA pushdown automaton.

   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.

   2003, Wilfried Brauer, Hartmut Ehrig, Juhani Karhumäki, Formal and Natural Computing: Essays

2. countableuncountablecomputingThe relegation of the transformation or processing of data to the originating datasource.

   filter pushdown

   1 more example

   predicate pushdown

plural pushdowns

1. bodybuildingAn exercise that requires one to push weight downward.

   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.

   (Can we date this quote?), Greg Merritt, “Go Beyond Failure with Dropsets”, in Muscle & Fitness

1. not comparableUsed by being pushed down.

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

   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, London: Independent News & Media, →ISSN, →OCLC, archived from the original on 04 Feb 2022

   2 more examples

   [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.

   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, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 09 Nov 2020, page 5, column 2

   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.

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