The position, and the responsibilities, evolved steadily over the next several generations.

Like any emerging technology, it has evolved steadily from earlier advances.

"This is a steadily evolving relationship," one Presidential adviser said.

Today, that process is still young but steadily evolving.

The vacuum bottle included in them, however, steadily evolved during the course of the decade and into the 1970s.

The corps evolved steadily following the 1915 summer campaign.

This causes the system to steadily evolve, although it can approach a stable equilibrium.

The team the Heat faced yesterday is a steadily evolving team.

However, climbing techniques, equipment and ethical considerations have evolved steadily.

His involvement with Royal Studios steadily evolved over the 1960s.