foam

noun

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\ ˈfōm

\

Definition of foam

(Entry 1 of 2)

1 : a light frothy mass of fine bubbles formed in or on the surface of a liquid or from a liquid: such as

a : a frothy mass formed in salivating or sweating

b : a stabilized froth produced chemically or mechanically and used especially in fighting oil fires

c : a material in a lightweight cellular form resulting from introduction of gas bubbles during manufacture

2 : sea

3 : something resembling foam

foam

verb

foamed; foaming; foams

Definition of foam (Entry 2 of 2)

intransitive verb

1a : to produce or form foam

b : to froth at the mouth especially in anger broadly : to be angry

2 : to gush out in foam

3 : to become covered with or as if with foam streets … foaming with life— Thomas Wolfe

transitive verb

1 : to cause to foam specifically : to cause air bubbles to form in

2 : to convert (something, such as a plastic) into a foam

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Examples of foam in a Sentence

Noun As I poured the beer, foam bubbled up in the glass. The fire extinguisher is filled with foam. a can of shaving foam Verb The soda foamed in the glass. The mixture will bubble and foam when you add the yeast.

Recent Examples on the Web: Noun When butter begins to foam, add onions and sauté for 5-10 minutes, or until just starting to brown. — Amanda Albee, Dallas News, "New Dallas chicken and dumpling cook-off to raise funds for mental health services," 23 Oct. 2020 Some of the foam that makes up the insole crumbled off, but overall the shoe is decently sturdy. — Kai Burkhardt, CNN Underscored, "Everlane’s new recyclable shoe is good for the planet — and your closet," 22 Oct. 2020 Once the butter begins to foam, add half the shrimp and sear until browned and just cooked through, about 1 minute per side. — Washington Post, "These over-the-top shrimp tacos are extra-saucy and extra-cheesy," 6 Oct. 2020 But by banning both plastic and paper single-use bags, as well as disposable food containers and cups made out of polystyrene foam, environmental advocates said the New Jersey bill is among the most stringent in the U.S. — Star Tribune, "New Jersey cracks down on the use of paper, plastic bags," 25 Sep. 2020 But by banning both plastic and paper single-use bags, as well as disposable food containers and cups made out of polystyrene foam, environmental advocates said the New Jersey bill is among the most stringent in the United States. — Mihir Zaveri, New York Times, "Even Paper Bags Will Be Banned From N.J. Supermarkets," 25 Sep. 2020 To get the pumpkins on the tree, look for faux mini pumpkins ($15 for a 12-pack, Amazon) that are made out of lightweight foam. — Emily Vanschmus, Better Homes & Gardens, "These Fall Displays Will Give You An Excuse to Put the Christmas Tree Up Early," 24 Sep. 2020 The crankshaft whipping through the oil in the oil pan causes oil to foam. — Paul Weissler, Popular Mechanics, "How to Pick the Right Motor Oil for Your Car," 31 Aug. 2020 Reviewers credit the foam in the midsole for the comfy feel, no matter the rough terrain underneath. — Emma Seymour, Good Housekeeping, "13 Best Hiking Boots for Women, According to Footwear Pros," 7 Oct. 2020 Recent Examples on the Web: Verb Remove from heat and stir in baking soda and vanilla extract: the mixture will foam and expand. — Andrea Mandell, USA TODAY, "It's National Dessert Day! Make John Stamos' favorite gluten-free dessert at home," 14 Oct. 2020 Butter will foam and start to become very fragrant. — Paul Stephen, ExpressNews.com, "Recipe: Honey Brown Butter Blondies with Sea Salt," 30 Sep. 2020 Let stand until foamy, 4 to 5 minutes (if yeast does not foam, discard and start again). — Marian Cooper Cairns, Country Living, "Pumpkin-Spiced Buns with Spiderweb Glaze," 7 Sep. 2020 This creates a foaming reaction when the two are mixed together to melt away that oven grime. — Nellah Bailey Mcgough, Southern Living, "How to Clean Your Oven," 29 May 2020 President Donald Trump’s foes are foaming at the mouth again. — Deroy Murdock, National Review, "Trump’s Critics Attack His Optimistic Case for Hydroxychloroquine," 7 Apr. 2020 Within 15-20 minutes after getting out of the pond, the dogs were foaming at the mouth, convulsing and losing their bodily functions. — Brian Albrecht, cleveland, "Toxic algae also threatens Ohio’s inland lakes, waterways," 12 Apr. 2020 The steep standard gauge railway takes passengers through tunnels, verdant mountainsides, and foaming waterfalls. — Isabel Garcia, House Beautiful, "These Virtual Train Rides Journey Through the World’s Most Scenic Sites," 16 Apr. 2020 Gwyneth Paltrow dies foaming at the mouth, and drums beat along to the action. — Josephine Livingstone, The New Republic, "Why You Should Watch Movies About Pandemics, During Pandemics," 18 Mar. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'foam.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.