Just put this in your remotes and then type !learn (topic) (definition)
type !del (word) to delete the definition and type !r (topic) for the bot to say the definition
I also made it so only certain people can add and delete the definitions. Just replace $nick1 $nick2 $nick3 with the 3 people you want. You can add more people though
Hope you like :-)

on *:TEXT:!learn *:#: { if ($istok($nick1 $nick2 $nick3,$nick,32)) {
    if (!$3) {
      notice $nick You didn't specify the right parameters.
      notice $nick Syntax: !learn <topic>: <description>
    }
    else {
      hadd -m learn $strip($2) $3-
    msg $chan  $strip($2) : $3- }
  }
}
on *:TEXT:!r *:#: {
  if (!$2) {
    notice $nick You didn't specify the right parameters.
    notice $nick Syntax: !r <topic>
  }
  elseif (!$hget(learn,$strip($2))) {
    msg $chan No data was found for $2 $+ .
  }
  else {
    msg $chan  $strip($2) : $+  $hget(learn,$2)
  }
}
on *:TEXT:!del *:#: { if ($istok($nick1 $nick2 $nick3,$nick,32)) {
    if (!$2) {
      notice $nick You didn't specify the right parameters.
      notice $nick Syntax: !del <topic>
    }
    elseif (!$hget(learn,$strip($2))) {
      msg $chan No data was found for $strip($2) $+ .
    }
    else {
      notice $nick Removed Definition $strip($2) ( $+ $hget(learn,$strip($2)) $+ ) 
    hdel learn $strip($2) }
  }
}
alias viewlearn {
  window -a @Learn
  var %x = 1
  while (%x <= $hget(learn,0).item) {
    echo -g @Learn $hget(learn,%x).item $+ : $hget(learn,%x).data
    inc %x
  }
}
on *:EXIT: { hsave learn learn.txt }
on *:START: { 
  if (!$isfile(learn.txt)) {
    noop $input(The hash table for the learn bot could not be found.,uwo,Error!)
  }
  else {
    hmake learn 100
    hload learn learn.txt 
  }
}