"One who is awakened [to the truth]."

Buddhism Day by Day

Wisdom for Modern Life by Daisaku Ikeda
Thursday, January 16, 2014:

 

The Sanskrit word buddha means "One who is awakened [to the truth]." While the term was widely employed by various schools of the time, it eventually came to be used exclusively in reference to Shakyamuni. At the same time, the word buddha implies "to bloom." A person who causes flowers of lofty character to brilliantly bloom and who bears the fruits of good fortune and benefit in abundance is a Buddha. Such a person manifests the benefit of the Law and shines with character overflowing with blessings.