Meaning of しっかり in Japanese

Definition of しっかり

しっかり(shikkari) 【確り ·聢り】

(adj-na, adv, adv-to, n, vs) firmly; tightly; reliable; level-headed; steady
君にもっとしっかり仕事をしてもらいたい。
I want you to work harder.

しっかりもの(shikkarimono) 【確り者】

Before meeting your guests also be sure to carefully check that the toilet door locks.

Is this bench firm?

Hold this ladder steady.

Please hold this ladder steady.

This table is shaky. Make it stay firm.

おご葬式そうしきで、未亡人みぼうじんは黒いくろいスーツ、帽子ぼうしそして手袋てぶくろをしてするとてもしっかりとして見えたみえる。

At the funeral, the widow looked very dignified, with her black suit, hat and gloves.

The drowning man grasped at the rope.

え、出かけるでかける前にまえに、しっかりかぎをかけたんですね。

Really? I had locked it up before I went out.

Holding an eel too fast is the way to let her escape.

Although the man's ideas are sound, because he can't express them well, he doesn't have a ghost of a chance of getting them accepted.