the arithmetic operation of summing; calculating the sum of two or more numbers; "the summation of four and three gives seven"; "four plus three equals seven"
a concluding summary (as in presenting a case before a law court)
(physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce
the skilled practice of a practical occupation; "he learned his trade as an apprentice"
the commercial exchange (buying and selling on domestic or international markets) of goods and services; "Venice was an important center of trade with the East"; "they are accused of conspiring to constrain trade"
the business given to a commercial establishment by its customers; "even before noon there was a considerable patronage"
exchange or give (something) in exchange for
turn in as payment or part payment for a purchase; "trade in an old car for a new one"
engage in the trade of; "he is merchandising telephone sets"
be traded at a certain price or under certain conditions; "The stock traded around $20 a share"