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 property of something that is great in magnitude; "it is cheaper to buy it in bulk"; "he received a mass of correspondence"; "the volume of exports"
being or moving higher in position or greater in some value; being above a former position or level; "the anchor is up"; "the sun is up"; "he lay face up"; "he is up by a pawn"; "the market is up"; "the corn is up"
spatially or metaphorically from a lower to a higher position; "look up!"; "the music surged up"; "the fragments flew upwards"; "prices soared upwards"; "upwardly mobile"
to a later time; "they moved the meeting date up"; "from childhood upward"
to a more central or a more northerly place; "was transferred up to headquarters"; "up to Canada for a vacation"
nearer to the speaker; "he walked up and grabbed my lapels"
an arithmetic operation that is the inverse of division; the product of two numbers is computed; "the multiplication of four by three gives twelve"; "four times three equals twelve"
a multiplicative increase; "repeated copying leads to a multiplication of errors"; "this multiplication of cells is a natural correlate of growth"