#1 decline v. [worsen] grow worse; "Conditions in the slum worsened". wn
#2 decline n. [diminution] change toward something smaller or lower. wn
#3 decline v. [refuse, reject, pass up, turn down] refuse to accept; "He refused my offer of hospitality". wn
#4 decline v. [refuse] show unwillingness towards; "he declined to join the group on a hike". wn
#5 decline n. [declination] a condition inferior to an earlier condition; a gradual falling off from a better state. wn
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