Definitions of slow:

• verb:   become slow or slower

  Example: "Production slowed"

• verb:   cause to proceed more slowly

  Example: "The illness slowed him down"

• verb:   lose velocity; move more slowly
• adjective:   not moving quickly; taking a comparatively long time

  Example: "A slow walker"

• adjective:   at a slow tempo

  Example: "The band played a slow waltz"

• adjective:   (used of timepieces) indicating a time earlier than the correct time

  Example: "The clock is slow"

• adjective:   (of business) not active or brisk

  Example: "Business is dull (or slow)"

• adjective:   so lacking in interest as to cause mental weariness
• adjective:   slow to learn or understand; lacking intellectual acuity

  Example: "Worked with the slow students"

• adverb:   without speed (`slow' is sometimes used informally for `slowly')

  Example: "He spoke slowly"

• adverb:   of timepieces

  Example: "The clock is almost an hour slow"