Denshi Jisho — Online Japanese dictionary

叔父 おじ uncle
Common word, Noun 
叔父 おじ uncle (younger than one's parent)
Common word, Noun, No-adjective, Humble (kenjougo) language 
叔母 おば aunt
Common word, Noun 
叔父貴 おじき uncle (younger than one's parent)
Noun, Honorific or respectful language 
叔父御 おじご uncle
Noun, Humble (kenjougo) language, Polite language 
叔父 おとおじ uncle (one's father's younger brother)
Noun, Archaism 
叔父 しゅくふ uncle
Noun 
叔父 しゅくふ uncle (younger than one's parent)
Noun, No-adjective, Humble (kenjougo) language 
叔母 しゅくぼ aunt
Noun 
叔父さん おじさん 1: (Honorific or respectful language) (Familiar language) uncle;
2: (Familiar language) old man; mister (vocative);
3: (Usually written using kana alone) manybar goatfish (Parupeneus multifasciatus)
Noun 
叔母さん おばさん aunt
Noun, Honorific or respectful language, Familiar language 
叔世 しゅくせい age of decline (said of a nation)
Noun 

You can also

Look up kanji details for 叔.

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