12-Letter Words That Start With: OBS

• the process of becoming obsolete; falling into disuse or becoming out of date

• a policy of opposition to enlightenment or the spread of knowledge

• a deliberate act intended to make something obscure

• the act of making and recording a measurement

• the act of observing; taking a patient look

• a remark expressing careful consideration

• facts learned by observing

• the act of noticing or paying attention

• a physician specializing in obstetrics

• a person who is deliberately vague

• noisily and stubbornly defiant

• boisterously and noisily aggressive

• any structure that makes progress difficult

• the physical condition of blocking or filling a passage with an obstruction

• something immaterial that stands in the way and must be circumvented or surmounted

• the act of obstructing

• getting in someone's way

• The state of being obscured.

• A unit of measurement used in particular for smoke detectors which respond to absorption of light by smoke, in percent absorption per unit length, e.g. % obs/ft, % obs/m.