Alert and paying close attention; watchful. / Diligently attentive in observing a law, custom, duty or principle; regardful; mindful.

Quality of being observant.

A member of a Franciscan order that strictly observes the rules of St. Francis.

plural of Observant

(uncountable) The state of being observable / (countable) A measure of the extent to which something is observable

plural of observability

Obsolete form of observance.

observant; watchful

plural of observance

(degree) To a detectable degree, sufficient to be observed. / (manner) In an observable manner. / (modal) Indicates that the proposition can be verified by observation.