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to be unable to answer a question, especially in a test
to not know the most recent information about something, so that you no longer understand it completely
to no longer have recent knowledge or information about something
to not know anything about a subject or not have the skills to do something
to be unable to imagine what something is like because you have never experienced it
mainly British if something passes you by, you do not notice it
to not know or understand something
to not have enough knowledge to give an opinion about something
to not find out that something has happened, especially something bad
to know nothing about a subject
English version of thesaurus of to not know something or someone
in competitive cycling, the illegal use of motors on bikes in order to gain advantage over other riders
in golf, a gentle hit of the ball so that it rolls along the ground a short distance towards the...
be reversed; be as if it had never happened
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Free thesaurus definition of to not know something or someone from the Macmillan English Dictionary - a free English dictionary online with thesaurus and with pronunciation from Macmillan Publishers Limited.