1Unevenness or bumpiness of a surface; roughness with bumps and hollows.
この道は凹凸があって自転車で走りにくい。
This road is bumpy and hard to ride a bicycle on.
壁の凹凸をパテで平らにした。
I smoothed out the bumps on the wall with putty.
古い石畳は凹凸がひどくて歩きにくい。
Old cobblestones are very uneven and hard to walk on.
2Imbalance, disparity, or unevenness (e.g., differences in numbers, abilities, or performance).
収入の凹凸をなくす政策が議論されている。
Policies to even out income disparities are being discussed.
試験の成績にはクラス間で凹凸が見られた。
There were disparities in test scores between classes.