requiring effort or concentration; complex and not easy to answer or solve; "raised serious objections to the proposal"; "the plan has a serious flaw"
of great consequence; "marriage is a serious matter"
concerned with work or important matters rather than play or trivialities; "a serious student of history"; "a serious attempt to learn to ski"; "gave me a serious look"; "a serious young man"; "are you serious or joking?"; "Don't be so serious!"
in addition; "agreed to provide essentials but nothing beyond"
farther along in space or time or degree; "through the valley and beyond"; "to the eighth grade but not beyond"; "will be influential in the 1990s and beyond"
on the farther side from the observer; "a pond with a hayfield beyond"
promise of reimbursement in the case of loss; paid to people or companies so concerned about hazards that they have made prepayments to an insurance company