Crest"fall`en (-f?l`'n), a.
1.
With hanging head; hence, dispirited; dejected; cowed.
Let it make thee crestfullen;
Ay, and allay this thy abortive pride.
Shak.
2.
Having the crest, or upper part of the neck, hanging to one side; -- said of a horse.
© Webster 1913.