die out

die out 

1. Lit. [for a species or family] to perish totally because of the failure to produce offspring. l am the last one in the family, so I guess our line will die out with me. The owls might die out if you ruin their nesting area.

2. Fig. [for an idea, practice, style, etc.] to fade away through time. That way of doing things died out a long time ago. It died out like the horse and buggy.

See also: die, out

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die out

to stop existing Bird-lovers thought a number of songbirds had died out, but they are back and noisier than ever.

See also: die, out