Answer

In Jain Dharma, an ekaavataari jiva is a soul that has only one birth left before liberation. In simple words, after one more life, it will go to moksha. Such souls are described in Jain literature as highly elevated and शुभाशय in nature, and the term is used for rare, spiritually advanced beings. ( vitragvani.com)

Explanation

There is usually no external physical mark by which an ordinary person can पहचान it. It is a karmic and spiritual अवस्था, not something visible from the body. Jain texts mention such beings among very पुण्यशाली souls, including some devas like the Sarvārthasiddhi devas, and also certain noble householders who are said to become ekaavataari after strong tapas. ( jainkosh.org)

Spiritual Understanding

The main spiritual meaning is that the soul has become very close to liberation. This reminds us that in Jainism, progress on the path comes through right faith, self-discipline, and reduction of passions. ( jainkosh.org)

Takeaway

So, the lakshan of an ekaavataari jiva is essentially this: only one more birth remains before moksha. It is a rare, very elevated state, and not something judged by outward appearance. ( vitragvani.com)