operate |
to function in a correct or effective manner, as a machine. [5 definitions] |
operation |
the act or process of operating or functioning. [5 definitions] |
operator |
one who controls functions, operations, or activities, as of machines or businesses. [4 definitions] |
operetta |
a short light, usu. humorous opera, often with dialogue that is spoken as well as sung. |
ophthalmologist |
a doctor who specializes in the study and treatment of eye diseases. |
ophthalmology |
the medical study of the eye, its diseases, and their treatments. |
opinion |
what one thinks about a matter, esp. a judgment not necessarily based on fact alone. [5 definitions] |
opossum |
any of a number of American marsupials that are active at night and live in trees. [2 definitions] |
opponent |
one who opposes; antagonist; foe. |
opportunity |
a chance that makes something possible or that may bring about some benefit. [2 definitions] |
oppose |
to think, act, or be against; resist or obstruct. [3 definitions] |
opposed |
not in favor of; against. |
opposite |
located at or on the sides opposing each other; facing. [7 definitions] |
opposition |
the act or state of opposing, or the state of being opposed. [3 definitions] |
oppress |
to treat harshly, brutally, or unfairly. [2 definitions] |
opt |
to decide; choose (usu. fol. by "for" or an infinitive). |
optical |
of or concerning the sense of sight or the eye. [5 definitions] |
optician |
a person who sells or manufactures eyeglasses, contact lenses, or other optical devices. . |
optimism |
the belief that everything will turn out well, or that there are good aspects of every situation. (Cf. pessimism.) [3 definitions] |
optimistic |
expecting or tending to expect favorable outcomes. [2 definitions] |
option |
the right, power, or freedom to choose. [4 definitions] |