Outright means completely and openly. Reject it outright, own it outright, an outright lie.
As an adverb it means without reservation — refused outright, banned outright. As an adjective it means complete and undisguised: an outright victory, an outright lie, an outright majority. Owning something outright means owing nothing on it, which is the standard use in property. Note that outright sits before the noun as an adjective and after the verb as an adverb, and the two are easily muddled.
1adverboutrightCompletely and openly.
“She told him outright that she didn't love him.”
2adjectiveundisguisedComplete and undisguised.
“The film was an outright failure, and the studio lost millions.”
outright is a manner of completeness.
Middle English outright is out plus right, in the older sense of right meaning straight or directly. Straightaway and downright are built on the same idea.
Middle English
outright
English, today
outright
From Middle English outright. by surface analysis, en + out + right.
Etymology from Wiktionary, CC BY-SA
Practised in Word Building