Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/cmd/dict/t.awk
NF == 2 { if($2 !~ / or / || $2 ~ /\(or/) print $0 else { n = split($2, a, / or /) for(i = 1; i <= n; i++) { printf "%s\t%s\n", $1, a[i] } } } NF != 2 { print $0 }