To not conform to or follow a pattern, set of rules or expectations.
To refuse to obey.
To challenge (someone) or brave (a hazard or opposition).
To follow or obey the custom, practice, or rules (especially of a religion).
To take note of and celebrate (a holiday or similar occurrence); to follow (a type of time or calendar reckoning).
To notice or view, especially carefully or with attention to detail.
To comment on something; to make an observation.