noun
one meaning; one thought
Used for a single interpretation or a unified idea. Often appears in contexts of focus or single-mindedness.
彼の言葉には一意の解釈しか許されない。
His words allow only one interpretation.
adverb
wholeheartedly; single-mindedly; devotedly
Adverbial use, often in the phrase 一意専心 (いちいせんしん) meaning 'with one's whole heart and mind'. Rarely used alone.
See also: 一意専心
彼は一意専心に研究に打ち込んだ。
He devoted himself wholeheartedly to his research.
noun which may take the genitive case particle 'no', na-adjective
Computing term for a unique key or identifier. Used as a no-adjective or na-adjective.
このテーブルでは、IDが一意でなければならない。
In this table, the ID must be unique.
A four-character compound meaning 'with one's whole heart and mind'; the adverbial sense of 一意 is mostly used within this phrase.
From 一 (one) + 意 (mind, meaning). The exact historical derivation is uncertain; the word is used in classical and modern contexts with a focus on singularity of purpose or interpretation.