1.become less tense, rest, or take one's ease;
He relaxed in the hot tub
2.make less tight;
relax the tension on the rope
3.become loose or looser or less tight;
The noose loosened
4.cause to feel relaxed;
A hot bath always relaxes me
5.become less tense, less formal, or less restrained, and assume a friendlier manner;
our new colleague relaxed when he saw that we were a friendly group
6.make less severe or strict;
The government relaxed the curfew after most of the rebels were caught
7.become less severe or strict;
The rules relaxed after the new director arrived
8.make less active or fast;
He slackened his pace as he got tired