a formation of people or things one beside another
the social force that binds you to the courses of action demanded by that force; every opportunity, an obligation; every possession, a duty"- John D.Rockefeller Jr
a mark that is long relative to its width
work that you are obliged to perform for moral or legal reasons
a formation of people or things one behind another
a length (straight or curved) without breadth or thickness; the trace of a moving point
a single frequency (or very narrow band) of radiation in a spectrum
a course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning
a fortified position (especially one marking the most forward position of troops)
text consisting of a row of words written across a page or computer screen
