Definition of "ambitious"

I was ambitious—have you knownThe passion, father? You have not:A cottager, I mark’d a throneOf half the world as all my own,And murmur’d at such lowly lot— […]

1829, Edgar Allan Poe, “Tamerlane”, in Al Aaraaf, Tamerlane and Minor Poems

As I grew richer I grew more ambitious, took a house in the country, and eventually married, without anyone having a suspicion as to my real occupation.

1891, Sir Arthur Conan Doyle, The Man with the Twisted Lip

Now he is joining a club ambitious to return to a model of dominating games and attacking opposition.

30 June 2019, Sam Wallace in The Telegraph, Manchester United must shape Aaron Wan-Bissaka into a £50m all-rounder - but there is no hiding place at Old Trafford

We were soon in the midst of the rapids, which were more swift and tumultuous than any we had poled up, and had turned to the side of the stream for the purpose of warping, when the boatmen, who felt some pride in their skill, and were ambitious to do something more than usual

1864, Henry David Thoreau, The Maine Woods

A “moving platform” scheme […] is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays. This set-up solves several problems […] . Stopping high-speed trains wastes energy and time, so why not simply slow them down enough for a moving platform to pull alongside?

2013 June 1, “Ideas coming down the track”, in The Economist, volume 407, number 8838, page 13 (Technology Quarterly)