1.make loose or looser;
loosen the tension on a rope
2.make less severe or strict;
The government relaxed the curfew after most of the rebels were caught
3.become less severe or strict;
The rules relaxed after the new director arrived
4.disentangle and raise the fibers of;
tease wool
5.cause to become loose;
undo the shoelace
6.make less dense;
loosen the soil
7.become loose or looser or less tight;
The noose loosened