diff --git a/cogs/dictionary_cog.py b/cogs/dictionary_cog.py
new file mode 100644
index 0000000..106ec28
--- /dev/null
+++ b/cogs/dictionary_cog.py
@@ -0,0 +1,149 @@
+import discord
+from discord.ext import commands
+from discord import app_commands
+import aiohttp
+import logging
+from typing import Optional, List, Dict, Any
+
+log = logging.getLogger(__name__)
+
+class DictionaryCog(commands.Cog, name="Dictionary"):
+    """Cog for word definition and dictionary lookup commands"""
+
+    def __init__(self, bot):
+        self.bot = bot
+        self.api_base_url = "https://api.dictionaryapi.dev/api/v2/entries/en"
+
+    async def _fetch_definition(self, word: str) -> Optional[Dict[str, Any]]:
+        """Fetch word definition from the Free Dictionary API."""
+        try:
+            async with aiohttp.ClientSession() as session:
+                url = f"{self.api_base_url}/{word.lower()}"
+                async with session.get(url) as response:
+                    if response.status == 200:
+                        data = await response.json()
+                        return data[0] if data else None
+                    elif response.status == 404:
+                        return None
+                    else:
+                        log.error(f"Dictionary API returned status {response.status} for word '{word}'")
+                        return None
+        except Exception as e:
+            log.error(f"Error fetching definition for '{word}': {e}")
+            return None
+
+    def _format_definition_embed(self, word: str, data: Dict[str, Any]) -> discord.Embed:
+        """Format the dictionary data into a Discord embed."""
+        embed = discord.Embed(
+            title=f"📖 Definition: {data.get('word', word).title()}",
+            color=discord.Color.blue()
+        )
+
+        # Add phonetic pronunciation if available
+        phonetics = data.get('phonetics', [])
+        if phonetics:
+            for phonetic in phonetics:
+                if phonetic.get('text'):
+                    embed.add_field(
+                        name="🔊 Pronunciation",
+                        value=phonetic['text'],
+                        inline=True
+                    )
+                    break
+
+        # Add meanings
+        meanings = data.get('meanings', [])
+        definition_count = 0
+        
+        for meaning in meanings[:3]:  # Limit to first 3 parts of speech
+            part_of_speech = meaning.get('partOfSpeech', 'Unknown')
+            definitions = meaning.get('definitions', [])
+            
+            if definitions:
+                definition_text = definitions[0].get('definition', 'No definition available')
+                example = definitions[0].get('example')
+                
+                field_value = f"**{definition_text}**"
+                if example:
+                    field_value += f"\n*Example: {example}*"
+                
+                embed.add_field(
+                    name=f"📝 {part_of_speech.title()}",
+                    value=field_value,
+                    inline=False
+                )
+                definition_count += 1
+
+        # Add etymology if available
+        etymology = data.get('etymology')
+        if etymology:
+            embed.add_field(
+                name="📚 Etymology",
+                value=etymology[:200] + "..." if len(etymology) > 200 else etymology,
+                inline=False
+            )
+
+        # Add source attribution
+        embed.set_footer(text="Powered by Free Dictionary API")
+        
+        return embed
+
+    async def _define_logic(self, word: str) -> Dict[str, Any]:
+        """Core logic for the define command."""
+        if not word or len(word.strip()) == 0:
+            return {
+                "error": "Please provide a word to define.",
+                "embed": None
+            }
+
+        # Clean the word input
+        clean_word = word.strip().lower()
+        
+        # Fetch definition
+        definition_data = await self._fetch_definition(clean_word)
+        
+        if definition_data is None:
+            return {
+                "error": f"❌ Sorry, I couldn't find a definition for '{word}'. Please check the spelling and try again.",
+                "embed": None
+            }
+
+        # Create embed
+        embed = self._format_definition_embed(word, definition_data)
+        
+        return {
+            "error": None,
+            "embed": embed
+        }
+
+    # --- Prefix Command ---
+    @commands.command(name="define", aliases=["def", "definition"])
+    async def define(self, ctx: commands.Context, *, word: str = None):
+        """Look up the definition of a word."""
+        if word is None:
+            await ctx.reply("Please provide a word to define. Usage: `!define <word>`")
+            return
+
+        result = await self._define_logic(word)
+        
+        if result["error"]:
+            await ctx.reply(result["error"])
+        else:
+            await ctx.reply(embed=result["embed"])
+
+    # --- Slash Command ---
+    @app_commands.command(name="define", description="Look up the definition of a word")
+    @app_commands.describe(word="The word you want to define")
+    async def define_slash(self, interaction: discord.Interaction, word: str):
+        """Slash command for word definition lookup."""
+        await interaction.response.defer()
+        
+        result = await self._define_logic(word)
+        
+        if result["error"]:
+            await interaction.followup.send(result["error"])
+        else:
+            await interaction.followup.send(embed=result["embed"])
+
+async def setup(bot: commands.Bot):
+    await bot.add_cog(DictionaryCog(bot))
diff --git a/cogs/help_cog.py b/cogs/help_cog.py
index 34f6b2d..9dff55f 100644
--- a/cogs/help_cog.py
+++ b/cogs/help_cog.py
@@ -7,6 +7,7 @@ import asyncio
 COG_DISPLAY_NAMES = {
     "AICog": "🤖 AI Chat",
     "AudioCog": "🎵 Audio Player",
+    "DictionaryCog": "📖 Dictionary",
     "GamesCog": "🎮 Games",
     "HelpCog": "❓ Help",
     "MultiConversationCog": "🤖 Multi-Conversation AI Chat",
diff --git a/neru_bot.py b/neru_bot.py
index 047112d..dd68f87 100644
--- a/neru_bot.py
+++ b/neru_bot.py
@@ -105,6 +105,7 @@ class NeruBot(commands.Bot):
                     "cogs.shell_command_cog",
                     "cogs.marriage_cog",
                     "cogs.upload_cog",
+                    "cogs.dictionary_cog",
                 ]
 
                 # Load each cog individually