Meaning of 一心 in Japanese

Definition of 一心

いっしん(isshin) 【一心】

いっしんに(isshinni) 【一心に】

いっしんどうたい(isshindoutai) 【一心同体】

いっしんふらん(isshinfuran) 【一心不乱】

(adj-na, n) wholeheartedly; with heart and soul; intently; with undivided attention; with intense concentration; single-mindedly
自分の仕事に一心不乱に打ち込みなさい。
Give yourself to your work with body and soul.

いっしんさんがん(isshinsangan) 【一心三観】

(n) (Buddh) simultaneous contemplation of the threefold truth (form of Tendai meditation) →Related words: 三諦

彼女かのじょは一心にいっしんに祈っていた。

She was rapt in prayer.

It's good to be able to concentrate single-mindedly on your work, but you're completely ignoring the people around you.

そのピアニストの演奏えんそう中ちゅう、彼らかれらは一心にいっしんに耳みみを傾けた。

They were all ears while the pianist was playing.