Antonyms of adj overambitious

1 sense of overambitious

Sense 1
overambitious -- (excessively ambitious)

INDIRECT (VIA ambitious) -> unambitious, ambitionless -- (having little desire for success or achievement)

Similarity of adj overambitious

1 sense of overambitious

Sense 1
overambitious -- (excessively ambitious)
       => ambitious (vs. unambitious) -- (having a strong desire for success or achievement)