1.not moving quickly; taking a comparatively long time;
a slow walker
2.at a slow tempo;
the band played a slow waltz
3.slow to learn or understand; lacking intellectual acuity;
so dense he never understands anything I say to him
4.(used of timepieces) indicating a time earlier than the correct time;
the clock is slow
5.so lacking in interest as to cause mental weariness;
a boring evening with uninteresting people
6.(of business) not active or brisk;
business is dull (or slow)
7.without speed (`slow' is sometimes used informally for `slowly');
he spoke slowly
8.of timepieces;
the clock is almost an hour slow
1.lose velocity; move more slowly;
The car decelerated
2.become slow or slower;
Production slowed
3.cause to proceed more slowly;
The illness slowed him down