To notice or view, especially carefully or with attention to detail.
To take note of and celebrate (a holiday or similar occurrence); to follow (a type of time or calendar reckoning).
To comment on something; to make an observation.
To follow or obey the custom, practice, or rules (especially of a religion).
To look slyly, or with the eyes half closed, or through a crevice; to peep.
To be only slightly, partially visible, as if peering out from a hiding place.
A quick glance or look.