an obstruction that stands in the way (and must be removed or surmounted or circumvented)
something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"
the act of referring or consulting; "reference to an encyclopedia produced the answer"
the most direct or specific meaning of a word or expression; the class of objects that an expression refers to; "the extension of `satellite of Mars' is the set containing only Demos and Phobos"
the relation between a word or phrase and the object or idea it refers to; "he argued that reference is a consequence of conditioned reflexes"
a publication (or a passage from a publication) that is referred to; "he carried an armful of references back to his desk"; "he spent hours looking for the source of that quotation"
limited in size or scope; "a small business"; "a newspaper with a modest circulation"; "small-scale plans"; "a pocket-size country"
inferior in number or size or amount; "a minor share of the profits"; "Ursa Minor"
lesser in scope or effect; "had minor differences"; "a minor disturbance"
not of legal age; "minor children"
of a scale or mode; "the minor keys"; "in B flat minor"
of your secondary field of academic concentration or specialization
of lesser importance or stature or rank; "a minor poet"; "had a minor part in the play"; "a minor official"; "many of these hardy adventurers were minor noblemen"; "minor back roads"
of lesser seriousness or danger; "suffered only minor injuries"; "some minor flooding"; "a minor tropical disturbance"
lengthen in time; cause to be or last longer; "We prolonged our stay"; "She extended her visit by another day"; "The meeting was drawn out until midnight"
lengthen or extend in duration or space; "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"
form a queue, form a line, stand in line; "Customers lined up in front of the store"
get something or somebody for a specific purpose; "I found this gadget that will serve as a bottle opener"; "I got hold of these tools to fix our plumbing"; "The chairman got hold of a secretary on Friday night to type the urgent letter"