excogitation UK /ɛksˌkɒdʒɪˈteɪʃən/US /ɛksˌkɑdʒəˈteɪʃən/ noun1 •Careful thought or consideration.186?, Charles Dickens, Our Mutual Friend To the excogitation of this problem, this harmless gentleman had devoted many anxious hours […] formsexcogitations