1. In a gradual manner
   - gradually, bit by bit 
2. Proceeding in steps
   - stepwise

1. One thing at a time
   - bit-by-bit, in small stages, piecemeal, stepwise

See also: gradual

Encyclopedia: Step by step

• mortgage loan
• mortgage-backed security
• mortgaged
• mortgagee
• mortgager
• mortgagor
• mortice
• mortician
• mortification
• mortified
• mortify
• mortifying
• Mortimer
• mortise
• mortise joint
• mortise-and-tenon joint
• mortmain
• Morton
• mortuary
• morula
• Morus
• Morus alba
• Morus nigra
• Morus rubra
• mosaic