Big
Part of speech: noun
Definition: An important or powerful person; a celebrity; a big name.
Part of speech: adjective
Definition: Of a great size; large; Thought to have undue influence. Popular. Adult. Fat. Important or significant. (construed with on) Enthusiastic (about). Mature, conscientious, principled.
Example sentence: Never give up on what you really want to do. The person with big dreams is more powerful than the one with all the facts.
Vainglorious
Part of speech: adjective
Definition: With excessive vanity or unwarranted pride.