Copy this code:

<div class="span5 definitions" ng-show="definitions">
    <h4>Definitions</h4>
    <div ng-repeat="item in definitions">
        <a href="#" ng-click="setWord(item)"
           class="defname">{{item.word | capitalize}}</a> &mdash;
        <ol style="display:inline">
            <span ng-repeat="(id, def) in item.definitions | lastModified">
                <i ng-show="item.definitions">{{id + 1}}.</i> {{def.def}}
            </span>
        </ol>
    </div>
</div>

the item.word is not recognized correctly. The item is not marked as occurrence.