Plural form of concentration

A plan or original idea, An abstract general conception; a notion; a universal, An understanding retained in the mind, from experience, reasoning and/or imagination; a generalization (generic, basic form), or abstraction (mental impression), of a particular set of instances or occurrences (specific, though different, recorded manifestations of the concept),

Plural form of concept

Of or relating to concepts or mental conception, Pertaining to conception, being or characterized by concepts or their formation

To be of interest or importance to, To cause anxiety or uneasiness in,

Interested and involved, Showing concern, Anxious; troubled,

In reference to, Pertaining to; regarding; having relation to; respecting; as regards, Regarding, respecting,

Plural form of concern,

Music A performance given by one or more singers or instrumentalists or both, The harmonious combination of two or more voices or instruments, A public performance of music in which several singers or instrumentalists, or both, participate; especially, one in which the program consists of detached numbers_ also applied to the performance of an oratorio, but not of an opera,

Third-person singular simple present indicative form of concert