(~s)
1.
The ~ of a hill or a wave is the top of it.
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If you say that you are on the ~ of a wave, you mean that you are feeling very happy and confident because things are going well for you.
The band are riding on the ~ of a wave with the worldwide success of their number one selling single.
PHRASE: v-link PHR, PHR after v
2.
A bird’s ~ is a group of upright feathers on the top of its head.
Both birds had a dark blue ~.
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3.
A ~ is a design that is the symbol of a noble family, a town, or an organization.
On the wall is the family ~.
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