underfull

underfull adjective: not full enough; not filled to available capacity.

Adjective

underfull (comparative more underfull, superlative most underfull)

Not full enough; not filled to available capacity.
- Commands forcing a figure in a particular place may create underfull pages […]2012, Bernice S. Lipkin, LaTeX for Linux: A Vade Mecum, page 68
- A bucket is underfull when it contains less than m/2 points. We allow at most one underfull bucket in a group. If there are two underfull buckets in a group, we merge them […]2014, Inge Li Gørtz, R. Ravi, Algorithm Theory - SWAT 2014: 14th Scandinavian Symposium

underfull (plural underfulls)

A full house that is beaten by someone else's full house.
- […] let's say the flop comes 9-9-8, with the open pair on top. One player has J-T-9-8 for the overfull—9s full of 8s for the nut full house—while another player has 8-8-7-6 for 8s full of 9s and the "underfull". The player with the underfull is both getting smashed and drawing dead.2008, Jeff Hwang, Pot-Limit Omaha Poker: The Big Play Strategy, Kensington Publishing Corp., →ISBN, page 5

From under- + full.

From under- + full house.

What does underfull mean?: Underfull means not full enough; not filled to available capacity.
What part of speech is underfull?: Underfull can be an adjective or a noun.

Adapted from Wiktionary: underfull (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-underfull.wav.

Cite this entry: “underfull.” Word.ws, https://word.ws/underfull. Based on Wiktionary, CC BY-SA 4.0.