one-on-one

adj.

1. Consisting of or being direct communication or exchange between two people: one-on-one instruction.
2. Sports. Playing directly or exclusively against a single opponent.

oneonone one'-on-one' adv.

A direct encounter between two persons, especially a conflict, as in The two department heads went one on one regarding shelf space. This slangy expression almost certainly comes from sports. It is commonly used to refer to a two-person basketball game, but is also applied to the interaction of two players on opposing teams in football, soccer, and similar team sports. [c. 1960]

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

The adjective has 2 meanings:

Meaning #1: directly between two individuals

Meaning #2: (sports) being a system of play in which an individual defensive player guards an individual offensive player
  Synonym: man-to-man

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The adverb one-on-one has one meaning:

Meaning #1: (of two persons) in direct encounter
  Synonym: person-to-person

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Dansk (Danish)
adj. - på tomandshånd

Nederlands (Dutch)
mandekking, één-op-één (gesprek etc.)

Français (French)
adj. - monoparental, à parti unique (système), (gén, Psych) face à face, (École) (cours) particuliers, (Math) biunivoque, (Sport) individuel
adv. - en tête-à-tête, face à face, à parti unique

Deutsch (German)
adj. - persönlich
adv. - persönlich

Ελληνική (Greek)
adj., -
adv. - ένας προς ένα
n. - αγώνας ένας προς ένα

Italiano (Italian)
monogamia, a confronto diretto, marcatura

Português (Portuguese)
adj. - um a um

Русский (Russian)
один на один (соревнова- ние/битва))

Español (Spanish)
adj. - marcaje, encuentro directo entre una persona y otra, cuerpo a cuerpo
adv. - marcaje, encuentro directo entre una persona y otra, cuerpo a cuerpo

Svenska (Swedish)
adj. - öga mot öga
adv. - öga mot öga
n. - möte (konfrontation) mellan två

中文（简体）(Chinese (Simplified))
一对一的, 面对面的

中文（繁體）(Chinese (Traditional))
adj. - 一對一的, 面對面的

한국어 (Korean)
adj. - 1대1의

日本語 (Japanese)
n. - マンツーマン

العربيه (Arabic)
‏(صفه) واحد على واحد (ظرف) شخصا لشخص (الاسم) مواجهه بين شخص لشخص, مراقبه شديدة‏

עברית (Hebrew)
adj. - ‮אחד על אחד, נוגע לתחרות או עימות של אחד מול אחד‬

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one	One Pound
Ck One	Opus One