Notice

avviso

(formal notification or warning)

comunicazione

(formal notification or warning)

notifica

(written or printed announcement)

percezione

(act of observing)

preavviso

(notification of termination of employment)

preavviso

(prior notification)

accorgersi

(to become aware of)

notare

(''(now rare in English)'' to remark upon)

osservare

(to become aware of)