1.Definition: (of business) not active or brisk
"Business is dull (or slow)"
2.Definition: (used of timepieces) indicating a time earlier than the correct time
"The clock is slow"
3.Definition: at a slow tempo
"The band played a slow waltz"
4.Definition: not moving quickly; taking a comparatively long time
"A slow walker", "The slow lane of traffic", "Her steps were slow", "He was slow in reacting to the news", "Slow but steady growth"
5.Definition: slow to learn or understand; lacking intellectual acuity
"Worked with the slow students"
6.Definition: so lacking in interest as to cause mental weariness