any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent
in a manner that facilitates; "he observed the snakes so he could describe their behavior"; "he stooped down so he could pick up his hat"
to a very great extent or degree; "the idea is so obvious"; "never been so happy"; "I love you so"; "my head aches so!"
(usually followed by `that') to an extent or degree as expressed; "he was so tired he could hardly stand"; "so dirty that it smells"
in such a condition or manner, especially as expressed or implied; "They're happy and I hope they will remain so"; "so live your life that old age will bring no regrets"
to a certain unspecified extent or degree; "I can only go so far with this student"; "can do only so much in a day"
in the same way; also; "I was offended and so was he"; "worked hard and so did she"
a lofty level or position or degree; "summer temperatures reached an all-time high"
a high place; "they stood on high and observed the countryside"; "he doesn't like heights"
a state of altered consciousness induced by alcohol or narcotics; "they took drugs to get a high on"
a state of sustained elation; "I'm on a permanent high these days"
an air mass of higher than normal pressure; "the east coast benefits from a Bermuda high"
happy and excited and energetic
slightly and pleasantly intoxicated from alcohol or a drug (especially marijuana)
(literal meaning) being at or having a relatively great or specific elevation or upward extension (sometimes used in combinations like `knee-high'); "a high mountain"; "high ceilings"; "high buildings"; "a high forehead"; "a high incline"; "a foot high"
greater than normal in degree or intensity or amount; "a high temperature"; "a high price"; "the high point of his career"; "high risks"; "has high hopes"; "the river is high"; "he has a high opinion of himself"
used of sounds and voices; high in pitch or frequency
at a great altitude; "he climbed high on the ladder"
far up toward the source; "he lives high up the river"
in or to a high position, amount, or degree; "prices have gone up far too high"
amount of a charge or payment relative to some basis; "a 10-minute phone call at that rate would cost $5"
a quantity or amount or measure considered as a proportion of another quantity or amount or measure; "the literacy rate"; "the retention rate"; "the dropout rate"
a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"
assign a rank or rating to; "how would you rank these students?"; "The restaurant is rated highly in the food guide"
estimate the value of; "How would you rate his chances to become President?"; "Gold was rated highly among the Romans"
be worthy of or have a certain rating; "This bond rates highly"
the act of allowing; "He objected to the allowance of smoking in the dining room"
a permissible difference; allowing some freedom to move within limits
an amount added or deducted on the basis of qualifying circumstances; "an allowance for profit"
an amount allowed or granted (as during a given period); "travel allowance"; "my weekly allowance of two eggs"; "a child's allowance should not be too generous"