Observation n. : The act or the faculty of observing or taking notice; the act of seeing, or of fixing the mind upon, anything.

Observation n. : The result of an act, or of acts, of observing; view; reflection; conclusion; judgment.

Observation n. : Hence: An expression of an opinion or judgment upon what one has observed; a remark.

Observation n. : Performance of what is prescribed; adherence in practice; observance.

Observation n. : The act of recognizing and noting some fact or occurrence in nature, as an aurora, a corona, or the structure of an animal.

Observation n. : Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc.

Observation n. : The information so acquired.

Example:


Taxonomy
bias, Naturalistic observation, Confirmation bias, measurement, behavior, researchers, scientific instruments, drawing conclusions, free encyclopedia, recording, science, observers, human senses, interaction, natural phenomenon, hypothesis, the experiment, fields of science.

Defination from the web:
Observation is either an activity of a living being (such as a human), consisting of receiving knowledge of the outside world through the senses, ... Observation plays a role in the second and fifth steps. ...