observe
verb.
discover or determine the existence, presence, or fact of
She detected high levels of lead in her drinking water|We found traces of lead in the paint
verb.
make mention of
She observed that his presentation took up too much time|They noted that it was a fine day to go sailing
Synonym: mention, note, remark
verb.
observe with care or pay close attention to
Take note of this chemical reaction
Synonym: take note, note
verb.
watch attentively
Please observe the reaction of these two chemicals
verb.
show respect towards
honor your parents!
verb.
behave as expected during of holidays or rites
Keep the commandments|celebrate Christmas|Observe Yom Kippur
Synonym: celebrate, keep
verb.
follow with the eyes or the mind
Keep an eye on the baby, please!|The world is watching Sarajevo|She followed the men with the binoculars
verb.
stick to correctly or closely
The pianist kept time with the metronome|keep count|I cannot keep track of all my employees
Synonym: keep, maintain
verb.
conform one's action or practice to
keep appointments|she never keeps her promises|We kept to the original conditions of the contract
Synonym: keep