Instant definitions, translations, and search results
for words and phrases you select or type.
Search the web without opening a new tab at the instant you select text on a page. Fetch definitions, translations, and examples from multiple sources in multiple languages at the same time. View results in a small pop-up bubble next to the selection area. Or search from extension's popup window by typing the query, instead of selecting it on a page.
Link: https://chromewebstore.google.com/detail/definer-popup-dictionary/noagjioaihamoljcbelhdlldnmlgnkon
Link: https://addons.mozilla.org/en-US/firefox/addon/lumetrium-definer/