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foil 1

tr.v. foiled, foil·ing, foils
1. To prevent from being successful; thwart: The alarm system foiled the thieves' robbery attempt.
2. To obscure or confuse (a trail or scent) so as to evade pursuers.
n. Archaic
1. A repulse; a setback.
2. The trail or scent of an animal.

[Middle English foilen, to trample, defile, variant of filen, to defile; see file3.]

foil 2

1. Metal that has been formed into a thin, flexible sheet: aluminum foil.
2. A thin layer of polished metal placed under a displayed gem to lend it brilliance.
3. One that stands in contrast to and emphasizes the distinctive characteristics of another: "I am resolved my husband shall not be a rival, but a foil to me" (Charlotte Brontë).
4. The reflective metal coating on the back of a glass mirror.
5. Architecture A curvilinear, often lobelike figure or space formed between the cusps of intersecting arcs, found especially in Gothic tracery and Moorish ornament.
a. An airfoil.
b. Nautical A hydrofoil.
tr.v. foiled, foil·ing, foils
1. To cover or back with foil.
2. To wrap (strands of hair) in pieces of foil in order to isolate them after bleach or color has been applied.
3. To set off by contrast.

[Middle English, from Old French foille, from Latin folia, pl. of folium, leaf; see bhel- in Indo-European roots.]

foil 3

1. A fencing sword having a usually circular guard and a thin, flexible four-sided blade with a button on the tip to prevent injury.
2. often foils The art or sport of fencing with such a sword: a contest at foils.

[Origin unknown.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.foiling - an act of hindering someone's plans or efforts
interference, hinderance, hindrance - the act of hindering or obstructing or impeding
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
A company that presented at the recent Holography Conference for the first time is UK-based Rotarylogic (RL), a leading supplier of bespoke industrial equipment and modules for print finishing, converting, hologram application and foiling, printing and packaging, and specialist application machines.
Our new embossing and foiling head will result in a superior emboss and the ability to push previous limits with sculptured embossing and custom background textures."
Because of this, API Foils' technical team were on the stand discussing the considerations needed at every stage of the foiling process, encouraging label professionals to choose the optimum solution, and not just a stand-alone product.
Cal Door foils RTF doors on a unique foiling press line.
According to Akzo Nobel, this technique eliminates the need for costly heated rotary engraved dies and offers converters benefits such as half tone metallic effects and clear fine detail foiling with no recession of the foiled image into the substrate.
According to vice president Dean Macris, Maje foiling is a vast improvement over other methods, such as pulling hair through a cap or using plain aluminum foil, which can slip and bleed, necessitating corrective work.
Low initial costs at the printer level and the process capabilities of cold foiling have driven the utilization of cold foil products.
Target markets for the SWIFT include decorative foiling for cosmetics, and security foiling for tax stamp and brand protection applications.