observer |
someone who observes an event such as a meeting but does not participate in it. [2 definitions] |
obsess |
to preoccupy the mind or emotions of (someone) excessively or abnormally. |
obsession |
that which preoccupies one's mind or emotions excessively or abnormally. [2 definitions] |
obsessive |
of, pertaining to, characterized by, or causing an obsession. |
obsessive-compulsive |
of or relating to having unwanted and uncontrollable thoughts (obsessions), and engaging in repetitive and uncontrollable behaviors (compulsions). [3 definitions] |
obsessive-compulsive disorder |
a mental disorder characterized by having unwanted and uncontrollable thoughts (obsessions), and/or engaging in repetitive and uncontrollable behaviors (compulsions); OCD. |
obsessive-compulsive neurosis |
an emotional disorder characterized by compulsions, irresistible urges, or both, and often manifested in ritualistic behavior. |
obsidian |
a dark, shiny volcanic glass, often used in jewelry, that fractures in a smooth, shell-like curve. |
obsolesce |
to become or be in the process of becoming obsolete. |
obsolescent |
in the process of going out of use or style; becoming obsolete. |
obsolete |
no longer in use, as a word or expression, or as a type of implement or equipment. [2 definitions] |
obstacle |
that which impedes or prevents forward movement or progress; obstruction. |
obstetric |
of or pertaining to childbirth or obstetrics. |
obstetrical |
of or relating to the care of women before, during, and after childbirth, or to the field of obstetrics. |
obstetrician |
a medical doctor whose specialty is pregnancy and childbirth. |
obstetrics |
(used with a sing. verb) the branch of medicine that deals with pregnancy and childbirth. |
obstinacy |
the state or quality of being stubborn; stubbornness. [2 definitions] |
obstinance |
the quality of holding stubbornly to one's own ideas or purposes; unwillingness to change or do what is asked. |
obstinate |
holding stubbornly to one's own ideas or purposes; unwilling to change. [2 definitions] |
obstreperous |
hard to control, as children resisting adult discipline; unruly. [2 definitions] |
obstruct |
to clog or block. [3 definitions] |