verb
-serves; -served; -serving
to watch and sometimes also listen to (someone or something) carefully [+ obj]
[+ obj] :to see and notice (someone or something)
[+ obj] :to make a comment about something you notice
[+ obj] :to do what a custom, rule, law, etc., says you should do
[+ obj] :to celebrate (a holiday) or honor (a person or event)