Definition of: observe

(əb·zûrv′) v. ·served, ·serv·ing v.t.
1. To notice by the sense of sight; see.
2. To watch attentively; keep under surveillance: to observe enemy troop movements.
3. To make methodical observation of, as for scientific purposes: to observe sunspots.
4. To abide by the restrictions or provisions of: to observe a fast.
5. To celebrate or solemnize (an occasion), as with appropriate festivities or ceremony.
6. To say as a comment or opinion; mention.
—v.i.
7. To make a remark; comment: often with on or upon.
8. To take notice.
9. To act as an observer. See synonyms under CELEBRATE, EXAMINE, FOLLOW, OBEY. [<OF observer <L observare watch <ob- towards + servare keep, watch]
—ob·serv′ing adjective
—ob·serv′ing·ly adverb