What does semblance mean as it is used in the following lines from Act I, Scene 5 of Romeo and Juliet?

Capulet: Content thee, gentle coz, let him alone,
He bears him like a portly gentleman;
And, to say truth, Verona brags of him
To be a virtuous and well-govern'd youth:
I would not for all the town
Here in my house do him disparagement:
Therefore be patient, take no note of him,--
It is my will; the which if thou respect,
Show a fair presence and put off these frowns,
An ill-beseeming semblance for a feast.

a. appearance***
b. dishonor
c. motive
d. reason