n.

1. A coat worn beneath another coat.
2. A covering of short hairs lying underneath the longer outer hairs of an animal's coat.
3. also un·der·coat·ing (-kō'tĭng)
   1. A coat of sealing material applied to a surface before the outer coats, as of paint, are applied.
   2. The sealing material used for this purpose.
   3. A tarlike substance sprayed on the underside of a vehicle to prevent rusting.

tr.v., -coat·ed, -coat·ing, -coats.

To apply an undercoat to.

1. A coat of paint applied on new wood, or over a primer, or over a previous coat of paint; improves the seal and serves as a base for the topcoat, for which it provides better adhesion.
2. Any paint which acts as a base for enamel.
3. Any primer which is colored.

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The fine hairs of an animal's coat which are usually shorter and more numerous than the coarse guard hairs. In some breeds of dogs and cats, however, these may predominate.

Note: click on a word meaning below to see its connections and related words.

The noun has 3 meanings:

Meaning #1: seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion
  Synonym: underseal

Meaning #2: the first or preliminary coat of paint or size applied to a surface
  Synonyms: flat coat, ground, primer, priming, primer coat, priming coat

Meaning #3: thick soft fur lying beneath the longer and coarser guard hair
  Synonym: underfur

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The verb undercoat has one meaning:

Meaning #1: cover with a primer; apply a primer to
  Synonyms: prime, ground

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Dansk (Danish)
n. - underuld, mellemstrygning
v. tr. - understryge

Nederlands (Dutch)
onderlaag, ondervacht, onderjas, tectyllaag

Français (French)
n. - manteau/pelisse, première couche, couche de fond, (US, Aut) revêtement antirouille
v. tr. - appliquer une première couche sur

Deutsch (German)
n. - (Zool.) Unterhaar, (Mantel)fütterung, Grundanstrich, Unterbodenschutz
v. - mit Unterbodenschutz versehen

Ελληνική (Greek)
n. - βασικό χρώμα

Italiano (Italian)
antiruggine

Português (Portuguese)
n. - casaco usado por baixo (m), base de pintura (f)

Русский (Russian)
одежда, носимая под другой одеждой, грунтовка (холста), подшерсток

Español (Spanish)
n. - primera mano, pelaje corto, chaqueta interior
v. tr. - dar la primera mano de pintura

Svenska (Swedish)
n. - mellanstrykning, mellanstrykningsfärg, nedre hårbeklädnad

中文（简体） (Chinese (Simplified))
大衣内的上衣, 内层油漆, 绒毛, 涂底漆

中文（繁體） (Chinese (Traditional))
n. - 大衣內的上衣, 內層油漆, 絨毛
v. tr. - 塗底漆

한국어 (Korean)
n. - 외투 속에 입는 겉옷, 속털, 방수용 밑칠
v. tr. - ~에 밑칠을 하다

日本語 (Japanese)
n. - 下塗り

العربيه (Arabic)
‏(الاسم) طبقه تحتيه من الطلاء ء, تنورة تحتيه‏

עברית (Hebrew)
n. - ‮צבע יסוד, שכבה תחתית, שכבת שיער או פלומה תחתונה של בעלי-חיים, מעיל-גשם הנלבש מתחת למעיל אחר‬
v. tr. - ‮צבע בצבע יסוד‬

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