Denshi Jisho — Online Japanese dictionary

確り しっかり firmly; tightly; reliable; level-headed; steady
Common word, Na-adjective, Adverb, Adverb taking the 'to' particle, Noun, Suru verb, Usually written using kana alone 
確り しっかりもの person of firm character; person of stability
Noun 

You can also

Look up kanji details for 確り.

Try a Yahoo Jisho search for 確り .
Try a Goo Jisho search for 確り .
Try a Google search for 確り .