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

• Millikan
• milliliter
• millilitre
• millime
• millimeter
• millimeter of mercury
• millimetre
• millimicron
• milline
• milliner
• millinery
• milling
• milling machine
• milling machinery
• million
• million floating point operations per second
• million instructions per second
• millionaire
• millionairess
• millionfold
• millionth
• scan
• scandal
• scandalisation
• scandalise